ok , tanx for help
i have buy 10 device form :
https://www.bitmaintech.com/productDetail.htm?pid=00020140630025130637RV8OhOwt06BC
It seems you will break even
in about 219 days
Date Difficulty Revenue Profit Return
2014 -6.897
8-6 – 8-6 (1 day) 18736 M 0.2141 0.2099 -6.687
8-7 – 8-19 (14 days) 22483 M 1.241 1.216 -5.471
8-20 – 9-1 (27 days) 26980 M 1.03 1.01 -4.462
9-2 – 9-14 (40 days) 32376 M 0.8551 0.838 -3.624
9-15 – 9-27 (53 days) 38851 M 0.7089 0.6948 -2.929
9-28 – 10-9 (65 days) 46622 M 0.5872 0.5754 -2.353
10-10 – 10-22 (78 days) 55946 M 0.4857 0.476 -1.877
10-23 – 11-4 (91 days) 67136 M 0.4012 0.3931 -1.484
11-5 – 11-17 (104 days) 80563 M 0.3307 0.3241 -1.16
11-18 – 11-29 (117 days) 96675 M 0.272 0.2665 -0.8937
11-30 – 12-12 (129 days) 116 G 0.223 0.2186 -0.6751
12-13 – 12-25 (142 days) 139 G 0.1823 0.1786 -0.4965
12-26 – 1-7 (155 days) 167 G 0.1483 0.1453 -0.3512
2015
1-8 – 1-20 (168 days) 200 G 0.12 0.1176 -0.2336
1-21 – 2-1 (181 days) 240 G 0.09637 0.09445 -0.1391
2-2 – 2-14 (193 days) 288 G 0.07671 0.07517 -0.06397
2-15 – 2-27 (206 days) 346 G 0.06032 0.05911 -0.0048532-28 – 3-12 (219 days) 415 G 0.04666 0.04573 0.040883-13 – 3-25 (232 days) 498 G 0.03528 0.03458 0.07546
3-26 – 4-6 (244 days) 598 G 0.0258 0.02528 0.1007
4-7 – 4-19 (257 days) 718 G 0.0179 0.01754 0.1183
4-20 – 5-2 (270 days) 861 G 0.01131 0.01109 0.1294
5-3 – 5-15 (283 days) 1034 G 0.005824 0.005707 0.1351
5-16 – 5-28 (296 days) 1241 G 0.00125 0.001225 0.1363
5-29 – 6-9 (308 days) 1489 G -0.002561 -0.00251 0.1338The only thing I can recommend you is not to sell the BTC you mine
maybe in 219 days price will be 5000$
hmmm same calculator shows ~98 days for me
2014 -6.8
8-5 – 8-6 (2 days) 18736 M 0.306 0.2999 -6.5
8-7 – 8-20 (16 days) 20610 M 1.231 1.206 -5.294
8-21 – 9-2 (29 days) 22671 M 1.1 1.078 -4.216
9-3 – 9-16 (43 days) 24938 M 0.9819 0.9623 -3.253
9-17 – 9-29 (56 days) 27432 M 0.8742 0.8567 -2.397
9-30 – 10-12 (69 days) 30175 M 0.7763 0.7607 -1.636
10-13 – 10-26 (83 days) 33192 M 0.6872 0.6735 -0.9624
10-27 – 11-8 (96 days) 36512 M 0.6063 0.5942 -0.3682
11-9 – 11-21 (109 days) 40163 M 0.5327 0.5221 0.1539
11-22 – 12-5 (123 days) 44179 M 0.4659 0.4565 0.6105
12-6 – 12-18 (136 days) 48597 M 0.4051 0.397 1.007
12-19 – 12-31 (149 days) 53457 M 0.3498 0.3428 1.35