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:
|    | A                                                                   | B   | C   | D   | E             | F            | G   | H                                                | I   | J   | K                  | L          | M            | N        | O                 |
|---:|:--------------------------------------------------------------------|:----|:----|:----|:--------------|:-------------|:----|:-------------------------------------------------|:----|:----|:-------------------|:-----------|:-------------|:---------|:------------------|
| 20 |                                                                     |     |     |     |               |              |     |                                                  |     |     |                    |            |              |          |                   |
| 21 | II. Prudency                                                        |     |     |     |               |              |     |                                                  |     |     |                    |            |              |          |                   |
| 22 | Prior Month Prudency Balance                                        |     |     |     | 0.0           | Man Input    |     |                                                  |     |     |                    |            |              |          |                   |
| 23 | Current Month Prudency                                              |     |     |     | 0.0           | Man Input    |     |                                                  |     |     |                    |            |              |          |                   |
| 24 | Current Month Prudency Balance                                      |     |     |     | 0.0           | Cell Ref     |     |                                                  |     |     |                    |            |              |          |                   |
| 25 | Accounting Adjustments - Schedule D                                 |     |     |     | 0.0           |              |     |                                                  |     |     |                    |            |              |          |                   |
| 26 | Total Prudency                                                      |     |     |     | 0.0           |              |     |                                                  |     |     |                    |            |              |          |                   |
| 27 |                                                                     |     |     |     |               |              |     |                                                  |     |     |                    |            |              |          |                   |
| 28 | III. Realized Gains (Losses)                                        |     |     |     |               |              |     |                                                  |     |     | ROLL               |            | Book Balance | Prudency |                   |
| 29 | Prior Month LTD Liquidations                                        |     |     |     | 2100000.0     | Manual Input |     |                                                  |     |     | Prior Month        |            |              |          |                   |
| 30 | Current Month Swap/Options Liquidations                             |     |     |     | [Target Cell] | Cell Ref     |     |                                                  |     |     | Gross Book Balance |            | -442100000.0 |          | Manual Input      |
| 31 | Current Month NYMEX Futures Liquidations                            |     |     |     | 0.0           | Cell Ref     |     |                                                  |     |     | Prudency           |            | 0.0          | 0.0      | cell Ref          |
| 32 | Current Month NYMEX Option Premiums                                 |     |     |     | 0.0           | Cell Ref     |     |                                                  |     |     | LTD Liquidations   |            | 2100000.0    |          | Manual Input      |
| 33 | Current Month Broker Fees                                           |     |     |     | 0.0           | Cell Ref     |     |                                                  |     |     |                    |            |              |          |                   |
| 34 | Current Month Rho/Drift & Liquidation Adjustments (Book/Acct Recon) |     |     |     | 0.0           | Cell Ref     | 0.0 | Current Month Liquidation Adj. (Book/Acct Recon) |     |     | Current MTD Daily  |            | -203000000.0 | 0.0      | Daily Total Below |
| 35 | Prior Period Liquidations Adjustment - Sched E                      |     |     |     | 0.0           | Cell Ref     | 0.0 | Current Month Rho/Drift                          |     |     |                    |            |              |          |                   |
| 36 | Current Month LTD Liquidations                                      |     |     |     | 2100000.0     |              |     |                                                  |     |     | Total              |            | -643000000.0 | 0.0      |                   |
| 37 |                                                                     |     |     |     |               |              |     |                                                  |     |     |                    |            |              |          |                   |
| 38 | IV. LTD Recognized                                                  |     |     |     | -644000000.0  |              |     |                                                  |     |     |                    | Difference | 1000000.0    | 0.0      |                   |
| 39 |                                                                     |     |     |     |               |              |     |                                                  |     |     |                    |            |              |          |                   |
| 40 |                                                                     |     |     |     |               |              |     |                                                  |     |     |                    |            |              |          |                   |



min_row: 20
max_row: 40
min_col: 1
max_col: 15
target_cell_row_idx: 30
target_cell_col_idx: 5
target_cell_value: 1000000.0
formula: =+B61