Final answer:
Trader Joe's supplier's current bottle cost is $2.49. To maintain a 10% margin after a 5% cost increase, Trader Joe's must raise the price or accept a reduced margin.
Step-by-step explanation:
The current cost per bottle from the supplier for Trader Joe's $2.99 Charles Shaw wine, considering a supplier's margin of 20%, is $2.49. Trader Joe's current profit per bottle, with its 10% margin, is $0.30. If the supplier increases the cost by 5%, the cost per bottle would go up to $2.62. To maintain a 10% margin, Trader Joe's would need to set the new retail price at approximately $2.88. However, if they chose to retain the $2.99 retail price with the increased supplier cost, their new margin would drop to roughly 12.4%, and the profit per bottle would decrease to $0.37 if demand stayed the same.
But with the projected 50% decrease in demand after a price increase, if the new retail price is $2.88, their profit would be half of the current total profit, factoring in reduced volume sales.