Last year courtney spent $3,658 for ballet lessons. this year she spent $500 more than last year. how much did courtney spend on ballet lessons for the two years, rounded to the nearest 100?
a) $4,100
b) $4,200
c) $7,800
d) $7,900

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?