Kubin Company's relevant range or production is $14,U$ to $\frac{?}{{?}_U},5UU$ units. When it produces and sells $\frac{1}{,}\frac{?}{{?}_{5}U}$ units, its average costs per unit are as follows:

$\backslash$table$[[,$Average cost$],[$Direct materials,$$7\mathrm{.}50$