To find out how much Mrs. Perez should write the check for, we need to subtract the amount she paid in cash from the total cost of the washing machine.
- Total cost of the washing machine: $1,456.20
- Amount paid in cash: $525.00
Now, subtract the cash payment from the total cost:
\[ 1,456.20 - 525.00 = 931.20 \]
Therefore, Mrs. Perez should write the check for $931.20.
The correct response is: $931.20.