Answer:
Emery should fill $185.24 in the given blank space.
Explanation:
As given,
Emery is depositing checks of $86.09, $311.53, and $12.62 into his checking account.
Emery wants to receive $225.00 cash back.
So, to know the amount filled by Emery to the right side we will subtract 225 from the sum of all the amounts.

= $185.24
Hence, Emery should fill $185.24 in the given blank space.