Final answer:
The interest amount is $6.80 and Miguel must pay Julio a total amount of $206.80 at the end of 6 months.
Step-by-step explanation:
To calculate the interest amount, we can use the formula: Interest = Principal x Rate x Time. In this case, the principal is $200, the rate is 6.8%, and the time is 6 months (0.5 years). So, the interest amount is:
Interest = $200 x 0.068 x 0.5 = $6.80
To calculate the total amount Miguel must pay Julio at the end of 6 months, we add the initial loan amount and the interest amount. So, the total amount is:
Total Amount = $200 + $6.80 = $206.80