Final answer:
The total cost if one of each item is purchased is $179.15.
Step-by-step explanation:
To find the total cost of purchasing one of each item, we can use the Associative Property of Addition to add the prices together. Let's add the prices:
$175 (graphing paper) + $0.90 (mechanical pencil) + $3.25 (pack of pencil grips)
Using mental math, we can calculate:
$175 + $0.90 + $3.25 = $179.15
Therefore, the total cost if one of each item is purchased is $179.15.