Brent received a report from the production and purchasing departments with the following values for august: actual materials quantity: 6,200 pounds total actual cost: $9,250 standard materials quantity: 1.25 pounds/unit standard price: $1.50/pound units made: 4,800 two days later, brent received a correction from the production department that they found a missing order for 200 units, which means they made 5,000 units in august. how much would brent’s materials quantity variance change for the month of august? a : $75f b : $375f c : $375 u d : $75 u