Answer:
The best overall price will be the bank offer because the cash disbursement are lower. Zara is looking for the cheapest overall price, which means the less cash disbursement regardless of the interest.
Explanation:
For the dealer option we need to calculate the cuota for an annuity of 66 month at 1.9% rate which a present value of 24,145 - 4,000 = 20,145
[tex]C * \frac{1-(1+r/12)^{-time} }{rate} = PV\\[/tex]
[tex]C * \frac{1-(1+0.019/12)^{-66} }{0.019/12} = 20,145\\[/tex]
The cuota for the dealer will be 321.69447 = 321.69
321.69 x 66 = 21231.54 overall cash price
Bank couta will be the annuity of 48 months at 3.50%
here we are using the cash rebate so 24,145 - 4,000 - 750 = 19,395
[tex]C * \frac{1-(1+0.035/12)^{-48} }{0.035/12} = 19,395\\[/tex]
Cuota from the Bank 431.01181 = 431.01
431.01 x 48 = 20688.48 overall cash price