Answer
The store owner made $104 .
Work Step by Step
The store owner ordered 25 calculators at 30 dollars each. This cost the store owner 750 dollars. The store owner then sold 22 calculators at 35 dollars each. HE took oin 22 x 35 = 770 dollars. The three unsold calculators were returned and (this is 90 dollar back to the store, initially), but those three calculators were assessed a 2 dollar return fee, so the store really only received 28 x 3 back or 84 dollars back.
The store owner's actual out of pocket payments was 666 dollars. (750 - 84).
The store owner sold calculators for a total of 770 dollars. The difference is 770 - 666 = 104 profit.
