choose the correct tools for the following task, selecting one or more tools from the list of tools

task:
provide the total cost of open positions

available tools:
- "personal" provides information on employees
- "math" provides mathematical functions
- "op" provides information on open positions
- "bank" provides information on available accounts
- "capital" provides information on revenue

formulate your answer in json format as in the following example
{"tool name 1": "task to perform with the tool"}
...
{"tool name n": "task to perform with the tool"}