Laplante Inc. uses the perpetual inventory system. The following transactions took place during January 2017

Required: Using the table below, calculate cost of goods sold for the January 9 and 24 sales, and ending inventory under the following inventory cost flow assumptions:
1. FIFO
2. Weighted average.

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Unit Units Cost Jan. 1 Opening Inventory 100 $1 Date 7 9 21 24 Purchase #1 Sale #1 Purchase #2 Sale #2 10 80 20 3 40 Sold Unit Total Purchased Balance in Inventory Date Unit Total Unit Total Unts CosUnits CostUnits Cost Jan. 1 100 $1 $100 9 21 24