urgent !!

3. The details of inventory on Jan. 1. 2019 and its subsequent purchase are given below. Date No. of Units Unit Price Total Cost Jan. 1 100 $20 Beginning balance Purchase Jan 10 200 $25 $2,000 $5,000 $3,000 $8,000 Jan 15 Purchase $30 100 200 Jan 30 Purchase $40 On February 1, 2019, the company sold 500 units at $40 each. Calculate the cost of goods sold using the First-In-First Out Method and the Gross Margin