For the firm whose production function and costs are specified in the table, its total$-$cost curve is

Table $13-1$

$\backslash$table$[[\backslash$table$[[$Number of$],[$Workers$]],$Output,$\backslash$table$[[$Fixed$],[$Cost$]],\backslash$table$[[$Variable$],[$Cost$]]],[0,0,$$$30,$$$0$