Paying for transportation to and from work is an example of a mandatory expense. a variable expense. a short-term expense. a discretionary expense.

The answer is "a variable expense". Paying for transportation to and from work is an example of a variable expense. Variable expenses are any expenses that are within your reach or control. This is also anything that you can buy in a store or service. The decision of the buying power is from you.

The  ancient egyptians  who  built the pyramids  may have been  able  to move massive stone blocks across the desert by wetting the sand in front of a contraption  built  to pull the heavy objects