real cost
Price + tax + fees + interest.
financial goal
Something you want to do with money, with an amount, a deadline and a plan.
factor
Something that helps or gets in the way of a goal.
interest rate
Interest as a percent, usually per year: 3% a year means $3 for every $100.
fee
Money charged for a service, like a monthly account fee or an ATM fee.
donate
To give money, goods or time to help others without expecting anything back.