During the first month of sales, a company sold 1,300,000
units of a certain type of smartphone. during the same
month, 15% of the units sold were returned. if sales and
the return rate remain the same for each of the next 5
months, about how many units of this smartphone will be
returned to the company during this 6-month period?
a) 195,000
b) 975,000
c) 1,170,000
d) 6,630,000