Food and Drug Administration.
Answer:
11m
Step-by-step explanation:
Lets break this down step by step.
4+4+4+4=16 lawns a week.
16+16+16+16=64 lawns a month.
64+64+64+64=256 lawns a year.
Then we take 256 x $25 to get $6,400 last year.
6,400<---Answer
-Seth