The Green Company makes chairs for which the following standards have been developed: Standard Inputs Standard Price Expected for Each Expected per Unit of Output Unit of Output Direct materials 10 pounds $4 per pound Direct labor 2 hours $23 per hour Production of 250 chairs was expected in March, but 300 chairs were actually completed. Direct materials purchased and used were 2,700 pounds at an actual price of $4.40 per pound. Direct labor cost for the month was $10,620, and the actual pay per hour was $19.00. ____________ is the standard direct-material cost for each chair produced.
选项：

A: $19.00
B: $40.00
C: $44.00
D: $46.00