Resources are generally costed in two flavors - "variable expenses" and "fixed expenses"

Variable Expenses

Some people charge by the hour, some by the day, some by the year.

Fixed Expenses

Sometimes resource costs are "fixed" such as the cost of a particular part or component you need to purchase.

JCVGantt Pro allows you to adjust how resources are calculated...and automatically figures out how much these resources will cost you while you plan.