Task: Formula-prediction-context (source dataset: enron-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:
|    | E                   | F   | G                         | H   | I         | J   | K           | L   | M       | N   | O                 | P   | Q                                                | R   | S   | T   | U   | V   | W   | X   | Y   |
|---:|:--------------------|:----|:--------------------------|:----|:----------|:----|:------------|:----|:--------|:----|:------------------|:----|:-------------------------------------------------|:----|:----|:----|:----|:----|:----|:----|:----|
|  6 | Trade Date          |     | Counterparty              |     | MMBtu     |     | Origination |     | Granted |     | Variance          |     | Description                                      |     |     |     |     |     |     |     |     |
|  7 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
|  8 | 2001-01-05 00:00:00 |     | Mexichem                  |     | 360000.0  |     | 900.0       |     | 900.0   |     | 0.0               |     | Mar 01 - May 01 Call Natural Gas                 |     |     |     |     |     |     |     |     |
|  9 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 10 | 2001-01-10 00:00:00 |     | Galvak                    |     | 180000.0  |     | 2700.0      |     | 2700.0  |     | 0.0               |     | Feb 01 - Apr 01 Put Natural Gas                  |     |     |     |     |     |     |     |     |
| 11 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 12 | 2001-01-19 00:00:00 |     | Gas Natural México        |     | 1040000.0 |     | 31000.0     |     | 31000.0 |     | 0.0               |     | Feb 01 - Sep 01 Swap Natural Gas                 |     |     |     |     |     |     |     |     |
| 13 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 14 | 2001-01-22 00:00:00 |     | Grupo Kimex               |     | 80000.0   |     | 800.0       |     | 800.0   |     | 0.0               |     | Feb 01 Call & Put Natural Gas                    |     |     |     |     |     |     |     |     |
| 15 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 16 | 2001-01-05 00:00:00 |     | Autlan                    |     | 0.0       |     | 0.0         |     | 4537.0  |     | [Target Cell]     |     | Mar 02 - Sep 05 ENA Fixed Price Swap Natural Gas |     |     |     |     |     |     |     |     |
| 17 |                     |     |                           |     |           |     |             |     |         |     |                   |     | Was included in Agustin's schedule 12/01/00.     |     |     |     |     |     |     |     |     |
| 18 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 19 |                     |     | Jan 2001 Totals           |     | 1660000.0 |     | 35400.0     |     | 39937.0 |     | 0.0               |     |                                                  |     |     |     |     |     |     |     |     |
| 20 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 21 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 22 | 2001-02-12 00:00:00 |     | Grupo Industrial Saltillo |     | 720000.0  |     | 7200.0      |     | 7200.0  |     | 0.0               |     | Jan 03 - Dec 03 Swap Natural Gas                 |     |     |     |     |     |     |     |     |
| 23 |                     |     |                           |     |           |     |             |     |         |     |                   |     |                                                  |     |     |     |     |     |     |     |     |
| 24 | 2001-02-16 00:00:00 |     | Vitro                     |     | 147567.0  |     | 5902.68     |     | 5010.0  |     | 892.6800000000003 |     | Mar 01 - Sep 01 Swap Natural Gas.  Per Errol     |     |     |     |     |     |     |     |     |
| 25 |                     |     |                           |     |           |     |             |     |         |     |                   |     | McLaughlin, variance will be corrected 3/30/01.  |     |     |     |     |     |     |     |     |
| 26 | 2001-02-22 00:00:00 |     | Sanitarios Azteca         |     | 162800.0  |     | 3663.0      |     | 3297.0  |     | 366.0             |     | Mar 01 - Dec 01 Swap Natural Gas.  Per Errol     |     |     |     |     |     |     |     |     |



min_row: 6
max_row: 26
min_col: 5
max_col: 25
target_cell_row_idx: 16
target_cell_col_idx: 15
target_cell_value: -4537.0
formula: =K16-M16