Table 3.

The expected total cost for $\beta =0.5$, usage rate (u) = 500 and.$\alpha =0.1,0.3,0.5$.

τ (months)	$k$	ETC ($)
		$\alpha =0.1$	$\alpha =0.3$	$\alpha =0.5$
1	36	1321	1407	1423
2	24	784.786	892.656	936.909
3	12	609.717	744.998	819.978
4	9	525.29	691.758	790.252
6	6	448.185	677.119	777.849
9	4	410.858	701.93	805.689
12	3	405.573	714.127	885.704
18	2	423.431	818.909	903.46

ETC, expected total cost.