... project costs are $451.75 for labor, $332.52 for materials and $289.12 for subcontracting for plumbing. Round these amounts to whole numbers to estimate the cost of the total project
This is an answer you should be able to do at the drop of a hat. If you are smart enough to get to this site and create a question you are able to understand rounding.
Any number below 5 (1, 2, 3, 4) is rounded down. Any number 5 or above (5, 6, 7, 8, 9) is rounded up. You are using the number to the right of the decimal point.
$451.75 = 452
$332.52 = 333
$289.12 = 289