Help me! Another question on khan.

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

When you find the area of a triangle do you use in. or in2