Rupie Mine

The Rupie Mine is a production facility that collects Rupies at set intervals and stores them up to a limit. Only two Rupie Mines can be built initially, but a third and fourth mine can be built at Player Lv. 22 and 34, respectively.

Payback Period

The time it takes for each level of the Rupie Mine to break even, or pay itself off, can be calculated with the following formula:

PaybackPeriod = [UpgradeCost*0.25]/50 + max(BuiltTime-0.25,0)

This first term in the formula calculates the number of days it takes to cover the cost of the upgrade at a rate of 50 Rupies every 0.25 days. The second term accounts for the time period where potential Rupies are lost because they cannot be collected during construction. Since this only happens when the build time exceeds 6 hours, the second term rejects negative numbers and only keeps zero/positive numbers.

Although the Rupie Mine takes awhile to pay itself off at later levels, it is a relatively cheap way of increasing facility level.

Table

Level	Prod. Time	Limit	Cost	Materials Required	Build Time	Payback Period
1	6 hr	800	50	—	3 sec	0.25 day
2	6 hr	850	100	—	30 sec	0.5 day
3	6 hr	900	150	—	1 min	0.75 day
4	6 hr	950	200	—	3 min	1 day
5	6 hr	1,000	250	—	5 min	1.25 days
6	6 hr	1,050	300	1x Light Orb	10 min	1.5 days
7	6 hr	1,100	350	1x Light Orb	20 min	1.75 days
8	6 hr	1,150	400	1x Light Orb	40 min	2 days
9	6 hr	1,200	500	2x Light Orb	1 hr	2.5 days
10	6 hr	1,250	600	2x Light Orb	2 hr	3 days
11	6 hr	1,300	700	3x Light Orb	3 hr	3.5 days
12	6 hr	1,350	800	3x Light Orb	4 hr	4 days
13	6 hr	1,400	900	3x Light Orb	5 hr	4.5 days
14	6 hr	1,450	1,000	5x Light Orb	6 hr	5 days
15	6 hr	1,500	1,100	5x Light Orb	7 hr	5.54 days
16	6 hr	1,550	1,200	8x Light Orb, 1x Radiance Orb	8 hr	6.08 days
17	6 hr	1,600	1,400	8x Light Orb, 1x Radiance Orb	10 hr	7.17 days
18	6 hr	1,650	1,600	8x Light Orb, 1x Radiance Orb	12 hr	8.25 days
19	6 hr	1,700	1,800	10x Light Orb, 1x Radiance Orb	14 hr	9.33 days
20	6 hr	1,750	2,000	10x Light Orb, 1x Radiance Orb	16 hr	10.42 days
21	6 hr	1,800	2,200	15x Light Orb, 2x Radiance Orb	18 hr	11.5 days
22	6 hr	1,850	2,400	15x Light Orb, 2x Radiance Orb	20 hr	12.58 days
23	6 hr	1,900	2,600	15x Light Orb, 2x Radiance Orb	22 hr	13.67 days
24	6 hr	1,950	2,800	20x Light Orb, 2x Radiance Orb	24 hr	14.75 days
25	6 hr	2,000	3,000	20x Light Orb, 2x Radiance Orb	28 hr	15.92 days
26	6 hr	2,050	3,200	30x Light Orb, 3x Radiance Orb, 1x Refulgence Orb	32 hr	17.08 days
27	6 hr	2,100	3,400	30x Light Orb, 3x Radiance Orb, 1x Refulgence Orb	36 hr	18.25 days
28	6 hr	2,150	3,600	30x Light Orb, 3x Radiance Orb, 1x Refulgence Orb	40 hr	19.42 days
29	6 hr	2,200	3,800	40x Light Orb, 3x Radiance Orb, 1x Refulgence Orb	44 hr	20.58 days
30	6 hr	2,250	4,000	40x Light Orb, 3x Radiance Orb, 1x Refulgence Orb	48 hr	21.75 days
Total			46,400	325x Light Orb, 30x Radiance Orb, 5x Refulgence Orb	16.7 days	—