r₁

n₁

r₂

n₂

r₃

n₃

r₄

n₄

Profit (£)

Offer

6

6

3

5

1 - 3

6

2

5

59.9700

10%

6

6

3

5

4

6

2

5

64.5389

15%

6

6

3

5

5

6

2

5

79.9600

15%

6

6

3

5

6

6

2

5

95.9520

15%