$\backslash$table$[[$REVENUE$],[$Grain sorghum,$22,$cwt$,$$$\frac{6\mathrm{.}00}{c}wt,],[$TOTAL REVENUE$],[$VARIABLE EXPENSES$],[$Preharvest Variable Expenses$],[$Seed$,2\mathrm{.}44,$lbs$,$$$\frac{1\mathrm{.}25}{l}b,],[$Herbicide$,2,$pts$,$$$\frac{3\mathrm{.}00}{p}t,],[$Fertilizer$,30,$lbs$,$$$.\frac{30}{1}b,],[$Machinery & Equipment,$1,$ac$,$$$\frac{20\mathrm{.}00}{a}c,],[$Labor$,1\mathrm{.}1,$hrs$,$$$\frac{9\mathrm{.}00}{h}r,],[$Interest on operating expenses,$23\mathrm{.}98,$$$,6\%,],[$TOTAL PREHARVEST VARIABLE EXPENSES$],[$Harvest Expenses$],[$Custom harvest,$1,$ac$,$$$\frac{12\mathrm{.}50}{a}c,],[$Hauling$,22,$cwt$,$$$.\frac{25}{c}wt,],[$TOTAL HARVEST EXPENSES$],[$TOTAL VARIABLE EXPENSES$],[$GROSS MARGIN$],[$FIXED EXPENSES$],[$Land Expense$],[$Gross rent,$132,$$$,\frac{1}{3},],[\backslash$table$[[$Less landlords share of$],[$expenses$]],,$$$,-\frac{1}{3},],[$Net rent$],[$TOTAL LAND EXPENSE$],[$Capital Expense$-$Ownership Costs$],[$Machinery and equipment,$1,$ac$,$$$\frac{19\mathrm{.}38}{a}c,],[$TOTAL CAPITAL EXPENSE$],[$TOTAL FIXED EXPENSES$],[$TOTAL EXPENSES,$],[$RETURNS TO MANAGEME,PAID L$,$NDI,,$]]$

What are preharvest variable expenses