During June, Zinc Company produced 10,000 chainsaw blades. The standard quantity of material allowed per unit was 2 pounds of steel per blade at a standard cost of $10 per pound. Zinc determined that it had a favorable materials usage variance of $1,600 for June. Calculate the actual quantity of materials used by Zinc Company in June. Group of answer choices 19,840 pounds 19,660 pounds 19,680 pounds 19,860 pounds