Last month, Duncan Incorporated's Assembly Division had total manufacturing costs of $457,250, total conversion costs of $279,000, and 38.750 equivalent units of production for both materials and conversion costs. During the same period, Mavis Manufacturing's Assembly Division had total manufacturing costs of $721,056, total conversion costs of $381.408, and 55,680 equivalent units of production for both materials and conversion costs. Based on these figures, Duncan's materials cost per unit was __than Mavist $0.35 more O $0.80 less $1.15 more $1.50 less