To determine which store offers the jacket for a cheaper price and by how much, let's calculate the final price after the discounts for both stores.
a) Comparison of Final Prices:
Retail Store:
List Price: $290
Discount: 18%
Amount of Discount: $290 \times 0.18 = $52.20
Final Price: $290 - $52.20 = $237.80
Department Store:
List Price: $265
Discount: 12%
Amount of Discount: $265 \times 0.12 = $31.80
Final Price: $265 - $31.80 = $233.20
Comparing both final prices, the department store offers the jacket for cheaper at $233.20.
Difference in Price:
The difference in price: $237.80 - $233.20 = $4.60
So, the department store offers the jacket for $4.60 less than the retail store.
b) Additional Trade Discount Rate Required:
To find the additional discount needed at the retail store to match the department store's price:
Current Final Price at Retail Store: $237.80
Desired Final Price: $233.20 (price at the department store)
Difference to Match: $237.80 - $233.20 = $4.60
Let's calculate the additional discount rate that would reduce the retail store's price by $4.60:
Let x be the additional discount rate.
290 × x = 4.60
x = 290 4.60 ≈ 0.01586 or 1.586%
Hence, the retail store would need to provide an additional discount of approximately 1.59% to match the department store's price.