Bamboo Supply produces bamboo cutting boards. The standard material cost for the bamboo used in each lamp is $16 per square foot Each board roquires 4 square feet of bamboo. In August, the company produced 1,500 cutting boards. There wore 4,300 square feet of bamboo used durling the month. The bamboo used thad an actual cost $17 per square foot. What was the materials quantity variance in August for bamboo? A. $27,200 favorabie B. 52 a , 900 favorable C. $28,900 unfavorable D. $27,200 unfavorable