IMO:
C
Total amount spent by the store on the writing pads it had in stock at the end of last month
= Amount spent on the stock(already in stock) + Amount spent on the stock(Purchased during this month) - Amount received on the sale.
(1) Last month the store purchased 150 writing pads for $0.80 each.
Total amount spent by the store on the writing pads it had in stock at the end of last month
= Amount spent on the stock(already in stock) + Amount spent on the stock(Purchased during this month) - Amount received on the sale.
Total amount spent by the store on the writing pads it had in stock at the end of last month
= 250*$0.75 + 150*$0.80 - Amount received on the sale(Unknown).
= 250*$0.75 + 150*$0.80 - Unknown
Insufficient!
(2) Last month the total revenue from the sale of writing pads was $180.
Total amount spent by the store on the writing pads it had in stock at the end of last month
= Amount spent on the stock(already in stock) + Amount spent on the stock(Purchased during this month) - Amount received on the sale.
Total amount spent by the store on the writing pads it had in stock at the end of last month
= 250*$0.75 + Amount spent on the stock(Purchased during this month) - $180.
= 250*$0.75 + Unknown - $180.
from 1 and 2
Amount spent on the stock(Purchased during this month) = 150*$0.80 and
Amount received on the sale = $180
Total amount spent by the store on the writing pads it had in stock at the end of last month = = 250*$0.75 + 150*$0.80 - $180.
