Answer:
B) Take the money out of savings — it is cheaper.
Explanation:
The real interest you are receiving from your bank account = 5% x (1 - tax rate) = 5% x 72% = 3.6%
If you decide to finance your purchases, you will be paying a 6% interest rate while keeping your money on the bank only yields 3.6%, so you should pay the gear with cash.