help plz... there is a part b.c.d. to this question so if you know you can answer those if not its fine

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) 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.g. 10.5219 and final answer to O decimal places, c.8. 61,052.) Cost of goods sold