Answer:
$ 21.05
Explanation:
Thinking process:
The original price = $ 20.00
Interest = 10 %
storage costs = $ 1.00
the new price = 0.1 × $ 20.00
= $ 2
However, this is paid over 6 months, so it will be = $ 2 (0.5)
= $ 1.00
The storage cost for 6 months = 0.5 (1.00)
= $ 0.5
The total cost at 6 months = $ 0.5 + $ 1.00 + $ 20.00
= $ 21.05