Shelby Bost Wish's cost formula for its cleaning equipment and supplies is $2.240 per month plus $38 per boot. For the month of September the company planned for activity of 80 boats, but the actual level of activity was boas. The actual cleaning equipment and supplies for the month wes $3.552 The activity variance for cleaning couloment and supplies in September would be closest to: O $1728F O $1786F O $1786 O $1280