Table 4.

The expected total cost for $\beta =0.3$,$\alpha =0.3$ and usage rate (u) = 200,…,500.

τ (months)	$k$	ETC ($)
		u = 200	u = 400	u = 500	u = 600
1	36	1411	1464	1499	1478
2	24	883.591	976.809	1048	1006
3	12	717.219	850.606	942.031	890.777
4	9	641.5	810.018	904.5	854.655
6	6	581.341	795.817	899.055	837.956
9	4	566.591	812.607	940.019	875.89
12	3	578.974	860.069	932.335	912.136
18	2	616.985	898.54	904.144	903.839

ETC, expected total cost.