$\backslash$table$[[\backslash$table$[[$Units of$],[$Resource$]],\backslash$table$[[$Total$],[$Product$]]],[1,24],[2,42],[3,54],[4,64],[5,72]]$

The table shows a total$-$product schedule for a resource. Assume that the quantities of other resources the firm employs remain constant. If the firm's product sells for a constant $$2$ and the price of the resource is a constant $$16,$ the firm will employ how many units of the resource?