Requirement $1.$ Select a graph depicting fixed costs, variable costs, and total costs for each event versus the number of guests.

Select the graph that depicting fixed costs, variable costs, and total costs for each event versus the number of guests. $($Enlarge each graph before selecting your answer$)$

c$.$

D$.$

Requirement $2$ Suppose $100$ persons attend the next event. What is National Training's total net cost and the cost per attendee? $($Round your answers to the nearest cent.$)$

For $100$ attendees, the total cost will be

and the cost per attendee will be

Requirement $3.$ Suppose instead that $175$ persons attend. What is National Training's total net cost and the cost per attendee. $($Round your answers to the nearest cent.$)$

For $175$ attendees, the total cost will be

and the cost per attendee will be

Requirement $4.$ How should National Training charge customers for their services? Explain briefly.

National Training should charge customers based on

As the number of

increase, National Training could offer price discounts because