Assume the total monthly operating costs of a local restaurant are:

$$10,000+$ $$0\mathrm{.}30$X

where X $=$ number of salad orders

$($a$)$ Determine the average cost per serving at each of the following monthly volumes: $100$; $1,000$; $5,000$; and $10,000.$

Round answers to one$$decimal place.

VolumeAverage Unit Cost$100$Answer $11,000$Answer $25,000$Answer $310,000$Answer $4$

$$

$($b$)$ Determine the monthly volume at which the average cost per serving is $$0\mathrm{.}70.$

Answer $5$ servings