Task: Formula-prediction-context (source dataset: pge-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   | N   | O   | P   | Q   | R   |
|---:|:----|:--------------------------------------------------------|:----|:----------|:----|:--------------------------------------------------------------------------------------------------------------|:----|:------------------------|:----|:----|:------------------------------------------------------------------------------|:----|:----|:----|:----|:----|:----|:----|
| 47 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 48 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 49 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 50 |     | Measure End Use(s)                                      |     |           |     | For example: Lighting, HVAC, Refrigeration, Process, Whole building, Other. Write more than one if necessary. |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 51 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 52 |     | Measure Types                                           |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 53 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 54 |     | Pre-Installation Review:                                |     |           |     |                                                                                                               |     |                         |     |     | Pre-Install Buy Down Calculations                                             |     |     |     |     |     |     |     |
| 55 |     | Proposed Project Costs                                  |     |           |     | PG&E Approved Loan Limit Exception?                                                                           |     | N/A                     |     |     | Rebates and Incentives:                                                       | 0.0 |     |     |     |     |     |     |
| 56 |     | Estimated Customer Buydown                              |     | 0.0       |     |                                                                                                               |     |                         |     |     | Project Costs Exceeding Loan Limit:                                           | 0.0 |     |     |     |     |     |     |
| 57 |     | QA Approved Loan Amount                                 |     | 0.0       |     | Buydown Percentage                                                                                            |     | [Target Cell]           |     |     | Buy Down Required for 10-yr Payback:                                          |     |     |     |     |     |     |     |
| 58 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     | Projects with buydowns that exceed 30% are not eligible for On-Bill Financing |     |     |     |     |     |     |     |
| 59 |     | Estimated Average Peak Demand Savings*                  |     |           |     |                                                                                                               |     | Forecasted Install Data |     |     |                                                                               |     |     |     |     |     |     |     |
| 60 |     | Estimated kWh Savings                                   |     |           |     | Install Start Date                                                                                            |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 61 |     | Estimated Therms Savings                                |     |           |     | Install Complete Date                                                                                         |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 62 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 63 |     | Average kWh Utility Rate                                |     | 0.0123431 |     | Estimated $ Savings                                                                                           |     | 0                       |     |     |                                                                               |     |     |     |     |     |     |     |
| 64 |     | Average Therm Utility Rate                              |     |           |     | Loan Term (yrs)                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 65 |     |                                                         |     |           |     |                                                                                                               |     |                         |     |     |                                                                               |     |     |     |     |     |     |     |
| 66 |     | Post-Installation Review:                               |     |           |     |                                                                                                               |     |                         |     |     | Post-Install Buy Down Calculations                                            |     |     |     |     |     |     |     |
| 67 |     | Final Project Costs (inclusive of all eligible aspects) |     |           |     | PG&E Approved Loan Limit Exception?                                                                           |     | N/A                     |     |     | Rebates and Incentives:                                                       | 0.0 |     |     |     |     |     |     |



min_row: 47
max_row: 67
min_col: 1
max_col: 18
target_cell_row_idx: 57
target_cell_col_idx: 8
target_cell_value: None
formula: =IFERROR(D56/D55,"")