This honest calculator for is an attempt to simulate a tool as close to reality as possible. But no matter how hard we try, we can not predict the change in the bitcoin/dollar/ruble/electricity rate, etc.
The Hashcoins Scrypt cloud mining is a decent way to outsource your mining to the cloud - with a daily fee of $0.005 / 1MH/s and 24/7 technical support via the HashFlare portal. The hash rate can be bought in increments of 1 MH at a cost of $7.50. This example uses 10 MH/s.