Consider the following data:

$$

Fixed costs $=$ $$10,000,000.$Variable cost per unit $=$ $$400.$Revenue per unit $=$ $$1,200.$

Within the relevant range, which of the following statements is most correct?

Question $8$ options:

$1)$

Higher volume leads to higher total costs.

$2)$

Higher volume leads to higher average costs.

$3)$

Higher volume leads to a higher variable cost per unit.

$4)$

Higher volume leads to a higher contribution margin per unit.

$5)$

None of these statements is correct.