A company has fixed costs of $900 and a per-unit contribution margin of $3. Which of the following statement is (are) true?

`Total contribution margin equals the sum of variable cost plus fixed cost.

`The situation described is not possible and there must be an error.

`Once the break-even point is reached, the company will increase income at the rate of $3 per unit.

`The firm will definitely lose money in this situation.