Kraft adopts a standard cost system, which specifies that each product uses a standard of 1 pound direct materials and direct materials' standard price is $28 per pound. Kraft produced 4,790 units of products in May. In that month, 4,850 pounds of direct materials were purchased and used at the total cost of $138,000. Calculate the direct materials price variance.
A. $3,800 unfavorable
B. $2.200 unfavorable
C. $5,180 unfavorable
D. $1,300 favorable