Answer: Yes, it seems reasonable.
Explanation:
1. You must keep on mind the information given in the problem:
- There were 5 friends.
- Each one of them had a buffet with a cost of $6.75.
- Two friends added ice cream for dessert for $1.99 each.
2. Therefore, the total cost is the adding of five buffets at $6.75 and two ice creams at $1.99, as following:

3. As you can see, it is reasonable because the total restaurant bill was $37.73, which is the sum of five buffets and two ice creams.