The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: a customer went to a shop and paid a total of $ 40 , out of which $ 1.28 was for sales tax on taxable purchases . if the tax rate was 8 % , then what was the cost of the tax free items ?
[EX A]: $ 22.72

[EX Q]: Problem: income and expenditure of a person are in the ratio 7 : 6 . if the income of the person is rs . 14000 , then find his savings ?
[EX A]: 2000

[EX Q]: Problem: in a can , there is a mixture of milk and water in the ratio 4 : 5 . if it is filled with an additional 6 litres of milk the can would be full and ratio of milk and water would become 6 : 5 . find the capacity of the can ?
[EX A]:
33