The total cost of 100 paper plates and 200 paper cups is $7.50 At the same rates what is the total cost of 20 of the plates and 40 of the cups? Pick one.
A) $ . 90 B) $ 1.00 C) $ 1.20 D) $ 1.50 E) $ 1.60

Rationale: "u dont need to go through all this what u have with u is 100 p + 200 c = $ 7.50 just divide the equation by 5 and you will get what u are looking for 20 p + 40 c = $ 1.50 therefore oa is d"
Answer: D