Discount Rates Engine

Java application to prepare a engine to calculate final cart price after applying sales and promotional offers.

Given some items with their base price as follows

Item	Price
Item1	50
Item2	45
Item3	30
Item4	15

Given the promotional offer as below

Item	Condition of offer	Discounted Rates
Item1	Buy 3	130
Item2	Buy 2	70
Item3 & Item4	Buy a combo of both	30

Cart Items - Test Cases

Cart Items - Case 1

Item	Quantity
Item1	4
Item2	3
Item3	2
Item4	1

Applying the promotional offer the total value of cart should be 355

• Explaination is as below
  • 4 Item 1 - 3 for discounted rate @ 130 and 1 for 50
  • 3 Item 2 - 2 for discounted rate @ 70 and 1 for 45
  • 2 Item3 and 1 Item4 - 1 quantity of Item3 @ 30 and a combo of Item3 and Item4 @ 30

Cart Items - Case 2

Item	Quantity
Item1	3
Item2	5
Item4	1

Applying the promotional offer the total value of cart should be 330

• Explaination is as below
  • 3 Item1 - 3 for discounted rate @ 130
  • 5 Item2 - 2 pairs for discounted rate @ 70 each (total 120) and 1 for 45
  • 1 Item4 - 1 Item4 priced @ 15