$\backslash$table$[[\backslash$table$[[$Quantity$],[($Dozens of pizzas$)]],\backslash$table$[[$Total Cost$],[($Dollars$)]],\backslash$table$[[$Variable Cost$],[($Dollars$)]]],[0,300,0],[1,350,50],[2,390,90],[3,420,120],[4,450,150],[5,490,190],[,540,240]]$

The pizzeria's fixed cost is $$ $