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:
|    | M   | N   | O   | P   | Q   | R                  | S                  | T                 | U                  | V                  | W                 | X                  | Y                  | Z                  | AA                 | AB                 | AC                 | AD                 | AE                 | AF                 | AG                 |
|---:|:----|:----|:----|:----|:----|:-------------------|:-------------------|:------------------|:-------------------|:-------------------|:------------------|:-------------------|:-------------------|:-------------------|:-------------------|:-------------------|:-------------------|:-------------------|:-------------------|:-------------------|:-------------------|
| 18 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 19 |     |     |     |     |     |                    |                    |                   |                    |                    | 1999              |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 20 | Mar | Apr | May | Jun | Jul | Aug                | Sep                | Oct               | Nov                | Dec                | Total             | Jan                | Feb                | Mar                | Apr                | May                | Jun                | Jul                | Aug                | Sep                | Oct                |
| 21 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 22 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4197.916666666667  | 8418.572048611111  | 8464.172647207755 | 8510.020249046796  | 12754.032858729133 | 42344.71447026146 | 17021.03387004725  | 17952.814470176672 | 19729.225548556795 | 21515.258853611478 | 23310.96650573521  | 25116.400907641273 | 30289.94807922433  | 38849.85196465346  | 47456.12199612867  | 56109.0093236077   |
| 23 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4197.916666666667  | 12616.488715277777 | 21080.66136248553 | 29590.681611532327 | 42344.71447026146  |                   | 17021.03387004725  | 34973.84834022392  | 54703.07388878072  | 76218.3327423922   | 99529.29924812741  | 124645.70015576869 | 154935.64823499302 | 193785.50019964649 | 241241.62219577515 | 297350.6315193829  |
| 24 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 25 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4197.916666666667  | 8418.572048611111  | 8464.172647207755 | 8510.020249046796  | 12754.032858729133 | 42344.71447026146 | 17021.03387004725  | 17952.814470176672 | 19729.225548556795 | 21515.258853611478 | 23310.96650573521  | 25116.400907641273 | 30289.94807922433  | 38849.85196465346  | 47456.12199612867  | 56109.0093236077   |
| 26 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4197.916666666667  | 12616.488715277777 | 21080.66136248553 | 29590.681611532327 | 42344.71447026146  |                   | 17021.03387004725  | 34973.84834022392  | 54703.07388878072  | 76218.3327423922   | 99529.29924812741  | 124645.70015576869 | 154935.64823499302 | 193785.50019964649 | 241241.62219577515 | 297350.6315193829  |
| 27 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 28 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1354.1666666666667 | 2715.668402777778  | 2730.378273292824 | 2745.1678222731603 | 2760.037481310473  | [Target Cell]     | 2774.987684334238  | 2790.018867624382  | 3487.6314698240144 | 4189.022806952228  | 4211.713347156552  | 4917.02679445365   | 5626.160689590274  | 5656.635726658888  | 6369.775836844958  | 13045.112122627868 |
| 29 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1354.1666666666667 | 4069.8350694444443 | 6800.213342737268 | 9545.381165010429  | 12305.418646320903 |                   | 2774.987684334238  | 5565.006551958621  | 9052.638021782635  | 13241.660828734864 | 17453.37417589142  | 22370.40097034507  | 27996.56165993534  | 33653.19738659423  | 40022.973223439185 | 53068.085346067055 |
| 30 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 31 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 32 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9750.0             | 29302.8125         | 48961.53606770833 | 68726.74438807508  | 96994.84758684383  | 96994.84758684383 | 36817.055424428734 | 75512.70323240646  | 118458.78579934407 | 165678.32631351927 | 216511.97267214625 | 271661.80128188245 | 337867.85812992137 | 421224.19778588717 | 522506.2176149895  | 647769.3483848327  |
| 33 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 34 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 35 |     |     |     |     |     |                    |                    |                   |                    |                    | As of 1999        |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 36 | Mar | Apr | May | Jun | Jul | Aug                | Sep                | Oct               | Nov                | Dec                | Total             | Jan                | Feb                | Mar                | Apr                | May                | Jun                | Jul                | Aug                | Sep                | Oct                |
| 37 |     |     |     |     |     |                    |                    |                   |                    |                    |                   |                    |                    |                    |                    |                    |                    |                    |                    |                    |                    |
| 38 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4197.916666666667  | 12616.488715277777 | 21080.66136248553 | 29590.681611532327 | 42344.71447026146  | 42344.71447026146 | 59365.74834030871  | 77318.56281048538  | 97047.78835904217  | 118563.04721265366 | 141874.01371838886 | 166990.41462603013 | 197280.36270525446 | 236130.21466990793 | 283586.33666603663 | 339695.34598964435 |



min_row: 18
max_row: 38
min_col: 13
max_col: 33
target_cell_row_idx: 28
target_cell_col_idx: 23
target_cell_value: 12305.418646320903
formula: =SUM(K28:V28)