A company's main material is fiber board sold by the square foot. The current cost of fiber board is $$4\mathrm{.}00$ per square foot. Delivery costs are $$0\mathrm{.}25$ per board foot, wages per hour are $$25\mathrm{.}00,$ payroll costs are $$3\mathrm{.}60$ per hour, and benefits are $$5\mathrm{.}00$ per hour. How much is the direct materials cost standard per square foot?

a$.$ $$4\mathrm{.}00$ per sq$.$ ft$.$

b: $$7\mathrm{.}85$ per sq$.$ ft$.$

c$.$ $$4\mathrm{.}25$ per sq$.$ ft$.$

d$.$ $$9\mathrm{.}25$ per sq$.$ ft$.$