Cioffi Manufacturing Company incorporates standards in its accounts and identifies variances at the time the manufacturing costs are incurred. Journalize the entries to record the following transactions: a. Purchased 2,450 units of copper tubing on account at $52.00 per unit. The standard price is $48.50 per unit. For a compound transaction, if an amount box does not require an entry, leave it blank. a. b. Used 1,900 units of copper tubing in the process of manufacturing 200 air conditioners. Ten units of copper tubing are required, at standard, to produce one air conditioner. For a compound transaction, if an amount box does not require an entry, leave it blank. b.