# Solved You Are Given The Following Term Structure Inte Interest Rate Formula Media Question Rates Effective Annual Find Differential Monthly Payment Calculator Current Graph

Finance Formulas / July 18, 2018 / Cecelia Weiss

## Principal Interest Formula

#### Profitability Formula

##### Profit And Loss Formula
###### Average Sale Period Formula

If you have credit cards or bank loans for your home, you pay interest (or a finance charge) on that money at a specific percentage over the course of the year. This is called APR, or annual percentage rate. Calculating your APR on your credit cards takes only a few minutes if you know some key factors and a little algebra. The APR on mortgage loans, however, is different from the simple interest rate because of additional charges or fees to you for securing your loan.

In the short run, a firm can make an economic profit. However, if there is economic profit, other firms will want to enter the market. If the market has no barriers to entry, new firms will enter, increase the supply of the commodity, and decrease the price. This decrease in price leads to a decrease in the firm’s revenue, so in the long-run, economic profit is zero. An economic profit of zero is also known as a normal profit. Despite earning an economic profit of zero, the firm may still be earning a positive accounting profit.

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