I have to calculate the moving weighted average method (rounding cost er unit o two decimal places)

Ending inventory : 34.760.75

Inventory purchases :

Beginning ..................619 units @. $78/unit

Feb 13...........................335 units @. $75/unit

Aug 5 ...........................215 units @. $88/unit

Two sales during the period, units have selling price of $138 per unit

feb 15...................................415 units

Aug 10..............................320 units