A firm's short$-$run cost function is

$C(q)=220q-6q^2+0\mathrm{.}6q^3+800$

Determine fixed cost, $F$; average variable cost, AVC; average cost, AC; marginal cost, MC; and average fixed$-$cost$,$ AFC.

The fixed cost function $(F)$ is

$F=.$

The average variable cost function $($AVC$)$ is

AVC$=($Propenty format your expression using the tools in the palette. Hover over tools to see keyboard shortcuts. E$.$g$.,$ a superscript can be created with the $^$ character.$)$

The average cost function $(AC)$ is

$AC=($Properly format your expression using the tools in the palette.$)$

The marginal cost function $($MC$)$ is

$MC=($Property format your expression using the tools in the palette.$)$

The average fixed cost function $($AFC$)$ is

AFC$=($Properly format your expression using the tools in the palette.$)$