Economic calculation of soap making and village income

The basis of this calculation is the exemple of a village worker in Mali, who bought seeds
from the village women and sold the soap on the local Market.

Description	Quantity	Unity	Price per unity US$	Amount in US$
Inputs
Seeds (give 3 liters of oil )	12	kg	0,1	1,20
Caustic soda	0,5	kg	1,2	0,60
Labour (4 h for pressing, 1 h soap production)	5	h	0,2	1,00
Depreciation/maintenance (5 years, 10 t/a, 240,-)		US$/kg	0,02	0,24
Total expenses				3,04

Revenues
Presscake	9	kg	0,03	0,27
White soap	28	pieces (170 g)	0,15	4,20
Total revenues				4,47

Net Profit			US$ 1,43

Profit per liter of oil			US$ 0,48
Profit per kg of soap			US$ 0,31
Price per kg of soap			US$ 0,89

If the results of this calculation are extrapolated to the situation of an average village in the Jatropha area, which has about 15 km of Jatropha hedges with a possible harvest of 12.000 kg of seeds (0.8 kg of seeds per m of Jatropha hedge), the monetary cash which is earned by the village people, is more than 3.000 US$ per year (1.000 times the result of the above mentioned production with 12 kg of seeds):

Sale of seeds	*12.000 0,1**	US$ 1.200,-
Labour for oil extraction	*5.000 0,2**	US$ 1.000,-
Net profit of the production unit	*1.000 1,43**	US$ 1.430,-
Total village income per year		US$ 3.630,-