Isaiah Co. sells rolier blades, model IX, that are popular with youth enthusiasts. Information relating to Isaiah's purchases of model IX during November in shown below. Isaiah Co, uses a perpetual inventory system Total Cost Date Explanation Units Unit Cost Nov. 1 Inventory 25 $1,100 27.500 Nov. 12 Purchases 20,000 20 1.000 30 Nov. 15 Sales Nov. 24 Purchases 20 1.040 20.800 25 1.050 26.250 Nov. 25 Purchases 50 Nov. 30 Sales Instructions (a) Compute the ending inventory and cost of goods sold using FIFO and Weighted Average Method on 30 November (round up to 0 decimals)