Table 3.

Machine-tool usage and labour costs.

	Component	C1	C2	C3	C4	C5	C6
Machine tool usage	Machine Tool Investment ($) [A]	22500.00	22500.00	22500.00	22500.00	22500.00	22500.00
	Investment for tooling (3 % of (A)) ($) [B]	675.00	675.00	675.00	675.00	675.00	675.00
	Investment for coolant delivery system ($) [C]	0.00	0.00	3180.00	3180.00	3180.00	675.00
	Investment for machine-tool installation ($) [D]	55.00	55.00	55.00	55.00	55.00	55.00
	Total ($) ([A] + [B] + [C] + [D])	23230.00	23230.00	26410.00	26410.00	26410.00	23905.00
	Depreciation Period (a)	10.00	10.00	10.00	10.00	10.00	10.00
	Cost rate of maintenance (1.5 % of A + B + C)	347.63	347.63	395.33	395.33	395.33	357.75
	Cost of insurances/taxes (0.4 % of A + B + C)	92.70	92.70	105.42	105.42	105.42	95.40
	Cost for tool holder ($)	24.00	24.00	24.00	24.00	24.00	24.00
	Time fraction for usage (h/a)	2808.00	2808.00	2808.00	2808.00	2808.00	2808.00
	Down time fraction [%]	20.00	20.00	20.00	20.00	20.00	20.00
	Time fraction for actual usage (h/a)	2246.40	2246.40	2246.40	2246.40	2246.40	2246.40
	Cost rate for machine tool usage ($/h)	1.24	1.24	1.41	1.41	1.41	1.28
Labor	Cost rate for direct labor ($/h) [V]	6.00	6.00	6.00	6.00	6.00	6.00
	Cost rate for indirect labor [10 % of V] ($/h)	0.60	0.60	0.60	0.60	0.60	0.60
	Cost rate for supervision [12 % of V] ($/h)	0.72	0.72	0.72	0.72	0.72	0.72
	Cost rate for fringe benefits [33 % of V] ($/h)	1.98	1.98	1.98	1.98	1.98	1.98
	Cost rate for Operator ($/h)	9.30	9.30	9.30	9.30	9.30	9.30
Overall Cost	Cost of overall machining ($/h)	10.54	10.54	10.71	10.71	10.71	10.58