Todweed Academy allocates certain costs to its three schools based various costs for the schools:

$\backslash$table$[[,$Lower,Middle,Upper,$],[$School$,$School,School,School,Total$],[$# of grades,$6,3,4,13],[$# of pupils,$600,400,400,1,400],[$Tuition revenue,$$1,200,000$$$1,200,000$$$1,600,000$$$4,000,000$