the last expert got this question wrong anyone eles wanna giver a go

At the beginning of its operations in March 2020, Mastiff Supplies Ltd, began with 7,380 units of inventory that it purchased at a cost of $7.00 each. The company's purchases during March were as follows: March 13 4,920 units @ $7.60 Sales during March March 2 March 20 4.920 units 2,730 units Mastiff Supplies uses a perpetual inventory system, (a) X Your answer is incorrect. Calculate the cost of goods sold for March using the weighted average cost formula (Round calculations for cost per unit to 4 decimal places, e-8. 10.5219 and final answer to O decimal places, e.s. 61.052.) Cost of goods sold $ 54462