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   |
|---:|:---------------------------------------------------------|:-------------------|:---------------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:----|:----|:----|:----|
|  3 |                                                          |                    |                |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
|  4 | Note: Only make changes to fields in yellow.             |                    |                |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
|  5 |                                                          |                    |                |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
|  6 |                                                          |                    |                |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
|  7 | Customer Site Information                                | Value              | Units          | Comments                                                                                                                                                                                                                                                                                                                    |     |     |     |     |
|  8 | Call Center Information                                  |                    |                |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
|  9 | Total Number of Agents                                   | 1800               | agent(s)       | 2000 maximum                                                                                                                                                                                                                                                                                                                |     |     |     |     |
| 10 | Number of Supervisors                                    | 200                | supervisor(s)  | Typically 10% of desktops                                                                                                                                                                                                                                                                                                   |     |     |     |     |
| 11 | (N/A for Finesse) Number of All Agents Monitors          |                    | session(s)     | 2 maximum supported                                                                                                                                                                                                                                                                                                         |     |     |     |     |
| 12 | Number of SSO enabled agents                             |                    | agent(s)       |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 13 | Number of non-SSO agents                                 | [Target Cell]      | agents(s)      |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 14 | Number of SSO enabled supervisors                        |                    | supervisor(s)  |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 15 | Number of non-SSO supervisors                            | 200                | supervisor(s)  |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 16 | Number of multi-channel agents                           |                    | agent(s)       |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 17 | Average number of non-voice MRDs per multi-channel agent |                    | Non-voice MRDs |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 18 | Maximum Login Time for all users                         | 5                  | minute(s)      | The total amount of time it should take for all agents to log into the Finesse server including Finesse failover conditions.  If the deployment includes 2000 agents and this value is set to 5 minutes, all 2000 agents should be able to point their browser to Finesse and complete the login sequence within 5 minutes. |     |     |     |     |
| 19 | Call Profile                                             |                    |                |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 20 | BHCA                                                     | 60000              | calls/hour     | Typically 30 calls per hour per agent                                                                                                                                                                                                                                                                                       |     |     |     |     |
| 21 | Agent Call Wrap-Up Time                                  | 30                 | second(s)      |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 22 | Average Call Duration                                    | 108                | second(s)      |                                                                                                                                                                                                                                                                                                                             |     |     |     |     |
| 23 | Calls Per Second                                         | 13.043478260869565 | Calls/Second   | Equal to ((Number of Agents) / (Average Call Duration))                                                                                                                                                                                                                                                                     |     |     |     |     |



min_row: 3
max_row: 23
min_col: 1
max_col: 8
target_cell_row_idx: 13
target_cell_col_idx: 2
target_cell_value: 1800
formula: =B9-B12