Final answer:
To find the original marked price for a 25% markup on cost, calculate the total cost of bananas, account for the loss from discounted and discarded bananas, and apply the markup only to the remaining bananas that are sold at full price.
Step-by-step explanation:
First, we need to calculate the total cost of the bananas. The grocer bought 300 pounds of bananas at $0.32 per pound.
Total Cost = 300 pounds × $0.32/pound
Next, we determine the losses. 25% of bananas are sold at 75% of cost, and 15% are discarded.
Sold Bananas (loss) = 300 pounds × 25% × (1 - 75%)
Discarded Bananas = 300 pounds × 15%
Calculating the remaining amount sold at full price:
Full Price Bananas = 300 pounds - Sold Bananas (loss) - Discarded Bananas
To achieve a 25% markup on cost, the selling price per pound must be:
Selling Price = Total Cost × (1 + 25%) ÷ Full Price Bananas
Finally, we find the original marked price per pound to meet the desired markup.