First you would have to calculate the total price the lawn mowers are bought for. Which you would multiply
300 × 75 = $22,500.
After you do that you get the total in which all 300 lawnmowers would be sold for. In this, you would multiply
300 × 104.95 = $31,485
Once you get these answers you will subtract
$31,485 - $22,500 = $8,985