Final answer:
To find the single dollars to be paid when given a price, use the expression 'price % 100'. This modulus operation yields the remainder of the price divided by 100, which represents the dollar amount in the single and tens places.
Step-by-step explanation:
To express the single dollars to be paid, assuming that price is a variable containing an integer representing the total price, we simply use the modulus operator. In many programming languages, this operator is represented by a percent sign (%). The modulus operator gives us the remainder of a division operation. When we divide the price by 100, we are left with the single dollar amount that is less than 100, which represents the single dollars to be paid. The expression would therefore be price % 100.
For example, if price is assigned a messy-looking number like $1727.89, and we are interested in extracting just the dollar portion that falls within the single digits (also known as the ones place), we would calculate 1727 % 100, which equals 27. Here, the integer 27 represents the single and tens place, which is the answer we seek.
This modulus operation is very useful in various financial calculations, where understanding and breaking down monetary amounts into smaller units is necessary, such as calculating the change due or interpreting economic price indices.