$6-36$ Deletion of Product Line

St$.$ Gallen American School is an international private elementary school. In addition to regular classes, after$-$school care is provided between $3$:$00$ PM and $6$:$00$ PM at CHF $10$ per child per hour. Financial results for the after$-$school care for a representative month are as follows:

$\backslash$table$[[$Revenue$,750$ hours at CHF $10$ per hour,CHF $7,500,],[$Less$,,],[$Teacher salaries,$1,200,],[$Supplies$,1,700,],[$Depreciation$,200,],[$Sanitary engineering,$400,8,{800}_{?}$