what was the change in sales from jan to feb

Question

In​ January, each of 50 people purchased a ​$300 washing machine. In​ February, ​10% fewer customers purchased the same washing machine that had increased in price by ​20%. What was the change in sales from January to​ February?

Answer 1

jan sales = 50 x 300 = $15,000

feb sales = 45 x 360 = $16,200

16200/15000= 1.08 = 1 + .08

= 8% increase in sales

and $1,200 increase in sales