Marquis Company uses a weighted average perpetual inventory system and has the following purchases and s August 2 August 18 August 29 13 units were purchased at $4 per unit. 18 units were purchased at $6 per unit. 15 units were sold. What is the amount of the cost of goods sold for this sale? (Round average cost per unit to 2 decimal places.) Multiple Choice $108.00 $77.40 O $160.00 $160.00 O $64.00 $64.00