Answer: $70 (or $69.86)
Explanation:
We know that she got enough sandwiches for 28 people and we know that each sandwich serves 2 people. This means that we have to divide 28 by 2 (because that gives us the amount of sandwiches she bought). If each sandwich is $4.99 (or rounded to $5), then we can multiply 5 by 14. This gives us 70. So, she payed $70 for the sandwiches.