Table: Labor and Output

$($Table: Production Function for Soybeans$)$ Use Table: Production Function for Soybeans. Assume that the fixed input, capital, is $10$ acres of land and a tractor, which have a combined cost of $\backslash (\backslash$$ $150\backslash )$ per day. The cost of labor is $\backslash (\backslash$$ $100\backslash )$ per worker per day. The variable cost of producing $60$ bushels of soybeans is:

$\backslash (\backslash$$ $300\backslash ).$

$\backslash$$$5.$

$\backslash$$$100.$

$\backslash$$$150.$