Pake City Brews uses a perpetual inventory system and has the following beginning inventory, purchases, and sales of inventory in April: Units UnitCost Total Cost Inventory, Apr. 1 6,000 $9 $54,000 Purchase, Apr. 9 18,000 $10 $180,000 Sale, Apr. 12 (20,000) Purchase, Apr. 1816,000 $11 $176,000 What was the moving weighted average unit cost after the last purchase on April 18? (a) $9.75 (b) $10.75 (c) $11.00 (d) $10.00