Acme, Inc.'s production function is Q = 360KV/3L2/3, with MPL = 240KV/3L-1/3 and MPk = 120K-2/3[2/3. The wage Acme pays is w= 1,680 per unit of labor and the rental rate of capital r = 105 per unit of capital. Acme's minimum per-unit cost of producing 3,600 units of output equals: a) 1.75 b) 3.50 c) 5.00 d) 6.25 e) None of the above are