A Car sales company is financing their customers' vehicles. Financing interest rates are as follows:

(I) For all motorcycles:

a. Customer Credit score 300 - 550

# Annual income US$ 40K-80K - Interest rate 15%

# Annual income US$ 81K-100K- Interest rate 12 %

# Annual income US $ 101K or more - Interest rate 9 %

b. Customer Credit score 551- 680

# Annual income US$ 40K-80K - Interest rate 12%

# Annual income US$ 81K-100K- Interest rate 9 %

# Annual income US $ 101K or more - Interest rate 7 %

c. Customer Credit score 681 or more

# Annual income US$ 40K-80K - Interest rate 10%

# Annual income US$ 81K-100K-Interest rate 6

# Annual income US $ 101K or more - Interest rate 5 %

(II) For all other vehicles the interest rate is 1 % less (from the values given above) for each category mentioned.

a) Ex: Customer Credit score 300 - 550

Annual income US$ 40K-80K - Interest rate 14% and so on.

What is the minimum number of test cases required to test the above application? (Hint: derive test cases using decision table technique using the decision table described in