You will be given a definition of a task first, then some input of the task.
The task is to generate the correct answer for a given math problem.

Problem: a , b and c started a business with capitals of rs . 8000 , rs . 10000 and rs . 12000 respectively . at the end of the year , the profit share of b is rs . 2500 . the difference between the profit shares of a and c is ?
Output:
1000