A servant is paid $21,000 and a suit annually. After 8 months he retires and receives $13,000 and the suit. How much does the suit cost?
The total annual salary of the servant is $21,000 + the cost of the suit.
After 8 months, the servant receives $13,000 and the suit.
This means that the servant has already received 8/12 = 2/3 of his annual salary.
So, 2/3 of the total salary is equal to $13,000.
Therefore, the total salary is (3/2) * $13,000 = $19,500.
This means that the cost of the suit is $19,500 - $21,000 = $2,100.
So, the suit costs $2,100.