X3= Labour Cost (N), X4=Extraction Cost (N), X5=
Depreciation on Tools (N), X6= Cost of Palm Fruits
(N), X8=Other Costs (water, transport, firewood
etc.) - These variables are measured in terms of
amount spent on hired labour used, extraction,
depreciation of fixed items, palm fruits, water,
transport and firewood respectively. They are
measured in naira and expected to have negative
relationship with the net returns.