Answer :

To estimate the total cost to the nearest dollar, follow these detailed steps:

1. List the Given Amounts:

We have four dollar amounts:
- [tex]$23.45 - $[/tex]3.98
- [tex]$16.66 - $[/tex]12.08

2. Calculate the Total Sum of All Amounts:

Add up the amounts:
[tex]\[ 23.45 + 3.98 + 16.66 + 12.08 = 56.17 \][/tex]

3. Round the Total Sum to the Nearest Dollar:

Look at the total sum calculated above, which is [tex]$56.17. The process of rounding involves looking at the first digit after the decimal point. - If the digit is 5 or more, round up. - If the digit is 4 or less, round down. In this case, 56.17 has a 1 in the tenths place, which is less than 5, so we round down. Therefore, rounding $[/tex]56.17 to the nearest dollar gives us $56.

4. Final Answer:

The estimated total cost to the nearest dollar is:
[tex]\[ \boxed{56} \][/tex]