The stock movements related to the yarn used in production in a textile manufacturing enterprise are shown in the table below. Description Quantity (pcs) Unit price ($) Inventory at the beginning of the period 5,00 Buying 5,10 dispatch to production Buying 5,30 dispatch to production Buying 5,30 Date 1 Feb 9 Feb 12 Feb 18 Feb 20 Feb 25 Feb 26 Feb 100 1000 700 2000 1500 3000 200 Purchase return Raw material cost related to the use of yarn in production a) Weighed weighted average cost method b) Moving average cost method c) First-in, first-out cost method d) Last in, first out cost method Calculate using Hint: Inventory at the beginning of the period should be considered as an entry to stock, and purchase return should be considered as an exit from stock