Sorry three months to pay my credit card company off and a 5% discount on the 513 purchase.

so 487 net price as  i subtracted wrong above and said 477.

so 487 after the cc discount and 90 days to pay the cc at no extra cost.

So for roi no one knows that.

I operate a bit differently than many miners.

I have gpus ,cpus,btc asics,ltc asics.

I have 1.4 ph of btc miners all paid off.
I have 10gh of ltc miners all paid off.
I around 60 gpus about 1600 usd owed. All on 90 day promos with no interest fees.

The gpus have temporary free power until end of the year.

So it is more complex to describe.  

Jan 1 all the gear above will be paid off. As I will prepay the 90  day promos this year for taxes.