Answer :
Okay so I did this:
$10.20*40 + $1.30= $409.3
$10.20*38 + $1.30 = $388.9
$409.3+$388.9= $798.2
Hope it helped!
$10.20*40 + $1.30= $409.3
$10.20*38 + $1.30 = $388.9
$409.3+$388.9= $798.2
Hope it helped!