i think i need to use FIFO. help! how would i solve this? correct answer is 1790

Question 5 The information below reflects all the inventory transactions for one month. April 01 - Balance 160 units @ $14 each April 12 - Purchased 320 units @ $15 each April 16 - Sold 240 units for $30 each April 22 - Purchased 160 units @ $16 each April 28 - Sold 290 units for $30 each The value of the inventory at the end of the month is 1790 X (1760). Enter digits only, no dollar signs, commas, or decimal points