r1

n1

r2

n2

r3

n3

r4

n4

Profit (£)

Offer

3

4

3

7

1 - 3

7

7

7

29.3439

10%

3

4

3

7

4

7

7

7

33.0465

20%

3

4

3

7

5

7

7

7

41.3082

20%

3

4

3

7

6

7

7

7

49.5698

20%

3

4

3

7

7

7

7

7

57.8314

20%