Joinn my zo om lets play some blookets
98867708157
9dPQPW

answer:

$75 (warranty included)   $60 (warranty excluded)

step-by-step explanation:

(warranty included)

900 divided by 12 would be $75

(warranty excluded)

first we need to find out in all how much he earned through warranty so we can exclude that from the final answer

15 x 12 = 180

we will then subtract that from the previous answer.

900 - 180 = 720

now we divide them

720 divided by 12 equals 60