A manufacturing company accumulates the following data on variable overhead: Actual cost incurred: $61,000; Actual allocation base times the standard variable rate: $64,000; Applied variable overhead: $60,000. The variable overhead efficiency variance is:

Assume the perpetual inventory method is used. 1) the company purchased $12,500 of merchandise on account under terms 2/10, n/30. 2) the company returned $1,200 of merchandise to the supplier before payment was made. 3) the liability was paid within the discount period. 4) all of the merchandise purchased was sold for $18,800 cash. what effect will the return of merchandise to the supplier have on the accounting equation?