Current Attempt in Progress Marin uses a periodic inventory system. In April, 600 units were sold and the following additional information is available: (a) Calculate the April 30 inventory and the April cost of goods sold using the weighted average cost formula. (Round the weighted average cost per unit to 2 decimal ploces, e 8.15 .25 and final answers to 0 decimal places, es. 5,125 .) April 30 inventory April cost of eoods sold