Answer:
$72
Explanation:
First lawn,
He mowed and weeded, so he got $20 + $12. Which equals $32.
Second Lawn,
He mowed and edged, so he got. $20 + $15. But he also got a $5 tip. Which equals $40.
Adding together,
In all he got $72 from (20+12) + (20+15) +5 = Total