The firm has two labor inputs: senior and junior laborer. The standard mix is 1 senior laborer hour per 3 junior laborer hours. Four total hours is the standard hour of input for a single finished goods unit. Senior laborers cost $20.95 per hour, and junior laborers cost $10.42 per hour.

The firm has actually completed 10,894 finished goods units and used 37,976 total labor hours.

What is the firm's yield variance?