The following data are for Kershaw Company for the last month. Budgeted direct labor mix at budgeted prices for actual output produced the following.

3,825 skilled hours at $16 per hour

1,275 unskilled hours at $12 per hour

5,100 total hours Actual results

4,000 skilled hours at $19 per hour

1,000 unskilled hours at $9 per hour

5,000 total hours

The direct labor yield variance for both types of labor together is

a. $1,500 F

b. $1,000 U

c. $1,000 F

d. $500 F