Please answer all questions

Jan 1: Beginning Inventory: 2,000 units at $4 cost per unit. Jan 8: Sold 1,000 units to a customer at a SALES PRICE of $9 per unit. Jan 12: Purchase from supplier: 4,000 units at $6 PURCHASE PRICE per unit. Jan 22: Sold 3,000 units at a sales price of $11 per unit. Jan 25: Purchase from supplier 3,000 units at $7 purchase price per unit. Jan 27: Sold 2,000 units at a sales price of $13 per unit. Perpetual FIFO COGS $ Perpetual FIFO EI $ Still referring to the inventory costing problem at the beginning of the test: Which System and Method results in the HIGHEST gross profit? Both Periodic and Perpetual LIFO There is not enough information to answer O Periodic Weighted Average O Both Periodic & Perpetual FIFO None of these O Perpetual Weighted Average