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              |
|---:|:---------|:------------------|:-------------------------------------------------|:------------|:--------|:----|:------------------|:-------|:-------------------|:----|:--------------|:---------------|
| 21 | 1.9      | UCSC-HS-C240M3    | Heat Sink for UCS C240 M3 Rack Server            | N/A         | 10 days | Yes | 14                | 0      | 0                  | 0   | 0             |                |
| 22 | 1.10     | UCSC-PCIF-01F     | Full height PCIe filler for C-Series             | N/A         | 10 days | Yes | 14                | 0      | 0                  | 0   | 0             |                |
| 23 | 1.11     | UCSC-PCIE-IRJ45   | Intel i350 Quad Port 1Gb Adapter                 | N/A         | 10 days | No  | 7                 | 999.38 | 6995.66            | 0   | 6995.66       |                |
| 24 | 1.12     | UCSC-PCIE-CSC-02  | Cisco VIC 1225 Dual Port 10Gb SFP+ CNA           | N/A         | 10 days | No  | 7                 | 1594   | 11158              | 0   | 11158         |                |
| 25 | 1.13     | CAB-9K10A-UK      | Power Cord 250VAC 10A BS1363 Plug (13 A fuse) UK | N/A         | 8 days  | No  | 14                | 0      | 0                  | 0   | 0             |                |
| 26 | 1.14     | UCSC-PSU-650W     | 650W power supply for C-series rack servers      | N/A         | 10 days | No  | 14                | 630    | 8820               | 0   | 8820          |                |
| 27 | 1.15     | UCSC-CMA2         | Cable Management Arm for C240 C260rack servers   | N/A         | 10 days | No  | 7                 | 185    | 1295               | 0   | 1295          |                |
| 28 |          |                   |                                                  |             |         |     | Products SubTotal |        |                    |     | 141073.66     |                |
| 29 | Services |                   |                                                  |             |         |     |                   |        |                    |     |               |                |
| 30 | 1.0.1    | CON-PSJ1-C240M3SF | UCS SUPP PSS 8X5XNBD UCS C240 M3 SFF w/o         | 12 month(s) | N/A     | No  | 7                 | 545.51 | 3818.5699999999997 | 0   | 3818.57       | PRIMARYSERVICE |
| 31 |          |                   |                                                  |             |         |     | Services SubTotal |        |                    |     | [Target Cell] |                |
| 32 |          |                   |                                                  |             |         |     | Configset Total   |        |                    |     | 144892.23     |                |



min_row: 21
max_row: 32
min_col: 1
max_col: 12
target_cell_row_idx: 31
target_cell_col_idx: 11
target_cell_value: 3818.57
formula: =IF(ISERROR(MATCH("--",K30:K30,0)),SUM(K30:K30),"--")