Gunnie Inc. produces and sells dog food. Each bag contains 20 pounds of dog food. Following additional information is provided by the company: Direct materials quantity standard 10 pounds per unit Direct materials price standard $0.02 per pound Direct labor time standard 0.1 hour per unit Direct labor rate standard $10.00 per hour Variable overhead rate standard $2.00 per machine hour Fixed overhead rate standard $1.00 per machine hour Machine hour standard 0.50 hours per unit Compute the standard unit cost for each bag. a. $2.55 b. $2.21 c. $2.70 d. $2.80