Chapter 8, Problem 8.5EYCT

Can you explain the correct approach to solve this general accounting question?

The standard materials cost to produce 1 unit of Product T is 6 pounds of material at a standard price of $38 per pound. In manufacturing 10,200 units, 50,500 pounds of material were used at a cost of $39 per pound. What is the total direct materials cost variance? A. $14,500 favorable B. $60,500 favorable  C. $24,900 unfavorable D. $50,500 unfavorable

I wont to correct answer