Problem 35
is what we need on

If you work for 30 hours a week for 8.75 an hour, you will get $262.50.

If you also work for an additional 12.5 hours a week at $11 an hour, you will get $137.50.

$262.50+$137.50=$400.

So you have to work 12 and a half hours a week as a landscaper to gain a total of $400.

19.63 pounds of dirt is the answer