Plug in your own numbers in the form below, and see how the result stacks up to your expectations.
1000 sales at $9.99 ($6.993 after fees) comes out to a revenue of $9990 ($6993 after fees).
With an estimated development cost of $10000, the final net result is $-7
1 year (about 2000 hours) of work equals roughly $-0/hour.