Task 12. (16 points)

The budget of the Petrovs consists of the following income items:

- parents' salary after income tax deduction - 56000 rubles;
- grandmother's pension - 14300 rubles;
- son's scholarship - 2500 rubles

Average monthly expenses of the family include:

- utility payments - 9800 rubles;
- food - 21000 rubles;
- transportation expenses - 3200 rubles;
- leisure - 5200 rubles;
- other expenses - 15000 rubles

10 percent of the remaining amount is transferred to a deposit for the formation of a financial safety cushion. Determine the amount that the Petrovs can save monthly for an upcoming vacation.

In the answer, indicate only the number without units of measurement!
# Solution:

family income

$56000+14300+2500=72800$ rubles.

average monthly expenses

$9800+21000+3200+5200+15000=54200$ rubles.

expenses for forming a financial safety cushion

$(72800-54200) * 0.1=1860$ rubles.

the amount the Petrovs can save monthly for the upcoming vacation

$72800-54200-1860=16740$ rubles.

Answer: 16740.