During June, 90,000 units were produced. The standard quantity of material allowed per unit was 2 pounds at a standard cost of $5 per pound. If there was an unfavorable quantity variance of $5,000 for June, the actual quantity of materials used must have been :
a) 179,000 pounds
b) 181,000 pounds
c) 84,000 pounds
d) 1,000 pounds