A business has compiled the following information for the year ended 31 October 20X2： $ Opening inventory 386,200 Purchases 989,000 Closing inventory 422,700 The gross profit as a percentage of sales is always 40% Based on these figures, what is the sales revenue for the year?
A．$1,333,500
B．$1,587,500
C．$2,381,250
D．The sales revenue figure cannot be calculated from this information