Task: Formula-prediction-context (source dataset: cisco-random)

You are given an table region extracted from a real Excel spreadsheet, which is centered around a cell called "Target Cell" (labeled as "[Target Cell]" shown in the table below). The table region below includes up to 10 rows above/below the Target Cell, and 10 columns to the left/right of the Target Cell. 

Your task is to analyze the table context surrounding the Target Cell, and predict the most likely Excel formula that should go in the Target Cell. If multiple formulas are possible, choose the most reasonable or commonly used based on context.

1. Please follow the standard formula syntax in Excel, e.g. always begins with an equal sign (=).
2. Base your predicted formula on the surrounding table context, e.g., column headers, annotations, and data values in nearby cells.
3. No explanation — just output the formula itself in a JSON format: {"formula": "your_formula_here"}.

Input Excel Snippet in Markdown format:
|    | A                                                                                                                                                                                                                                                                                              | B                               | C                     | D                            | E                        | F   | G   | H   | I   | J   | K   | L   | M      |
|---:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:--------------------------------|:----------------------|:-----------------------------|:-------------------------|:----|:----|:----|:----|:----|:----|:----|:-------|
|  1 | NOTE: SKU Finder may not work with Version of Excel prior to 2013.                                                                                                                                                                                                                             |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|    | Step 1:  Paste or type SKU/ list of SKUs into Column A.                                                                                                                                                                                                                                        |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|    | • The “Contract Approved SKU” will appear in Column C and the “Contract Approved List Price” will appear in Column D.  “Not Found” will appear if the SKU is not listed on the PL.  Double check spelling, contract carve-outs and US Global Price List to ensure SKU is listed if “Not Found” |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|    | Step 2:  Paste or Type Product/ Service List Price into Column B                                                                                                                                                                                                                               |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|    | • A green or red result will return in Column E, “Variance from List Price”  |  Green = no variance from list price, Red = Variance exists and is listed                                                                                                                                       |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|    | Step 3:  Filter and Sort by “Not Found” in Column C to have each “Not Found” descend one after the other                                                                                                                                                                                       |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  2 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  3 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  4 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  5 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  6 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  7 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  8 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
|  9 | Product/Service SKU                                                                                                                                                                                                                                                                            | Product/Service Unit List Price | Contract Approved SKU | Contract Approved List Price | Variance from List Price |     |     |     |     |     |     |     | Amatch |
| 10 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              | [Target Cell]            |     |     |     |     |     |     |     |        |
| 11 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 12 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 13 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 14 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 15 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 16 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 17 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 18 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 19 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |
| 20 |                                                                                                                                                                                                                                                                                                |                                 |                       |                              |                          |     |     |     |     |     |     |     |        |



min_row: 1
max_row: 20
min_col: 1
max_col: 13
target_cell_row_idx: 10
target_cell_col_idx: 5
target_cell_value: None
formula: =IFERROR(_xlfn.IFNA(D10-B10,""),"")