Caselet

A shop sold 200 pens at $10 each and 150 notebooks at $40 each. The cost of the pens was 70% of their sales revenue, and the cost of the notebooks was 80% of their sales revenue.

Question

What was the shop's total profit?

Table built from the caselet

Solution

1. Pens: revenue = 200 x 10 = 2,000; cost = 70% of 2,000 = 1,400; profit = 600.
2. Notebooks: revenue = 150 x 40 = 6,000; cost = 80% of 6,000 = 4,800; profit = 1,200.
3. Total profit = 600 + 1,200 = $1,800.