Big Dog Company, a manufacturer of dog food, produces its product in 1,000-bag batches. The standard cost of each batch consists of 7,000 pounds of direct materials at $0.40 per pound, 50 direct labor hours at $8.50 per hour, and variable overhead cost (based on machine hours) at the rate of $10 per hour with 18 machine hours per batch. The following variable costs were incurred for the last 1,000-bag batch produced: Direct materials 7,300 pounds costing $2,778 were purchased and used Direct labor 45 hours costing $450 Variable overhead $250 Machine hours used 20 hours (a) Determine the actual and standard variable costs per bag of dog food produced, separated into direct materials, direct labor, and variable overhead.