Question

In January, each of 80 people purchased a $300 washing machine. In February, 10% fewer customers purchased the same washing machine that had increased in price by 10%. What was the decrease in sales, in dollars, from January to February?

Answer 1

# of people * cost = sales

January # of people = 80
January cost = 300

February # of people = .9(January # of people)
February cost = 1.1(January cost)

February cost = January cost = decrease in sales