Closing stock = 98500
Sales = 520000
Sales return = 20000
Purchases = 322250
Find average stock 76250 + 98500 = 174750 / 2 = 87375
Sales 520,000 - 20000 = 500,000
Turnover 500,000 / 87375 = 5.72
Open stock = 76250
Closing stock = 98500
Sales = 520000
Sales return = 20000
Purchases = 322250