A farmer collected the following data, mapping the amount of fertilizer per acre to the quantity of wheat produced.A unit of fertilizer costs $8.An acre of land is leased for $20 per year.A unit of wheat sells for $4.What is the optimal level of output per acre?

\fFC VC MC_approx MC_exact AFC AVC ATC profit 20 0.10336324 0.21362657 20 0.10336324 20.1033632 -16.103363 20 0.4330336 0.32967036 0.44748734 10 0.2165168 10.2165168 -12.433034