Pratte Boat Wash's cost formula for its cleaning equipment and supplies is $2,490 per month plus $47 per boat. For the month of April, the company planned for activity of 54 boats, but the actual level of activity was 12 boats. The actual cieaning equipment and supplies for the month was $3,150. The activity variance for deaning equipment and supplies in April would be closest to: Wimile Choice \$t.974F sth7e U 54878F $1.974U