Ok, let's have another go...

The winning number is 000.

So:

Exact 3-Digit Match: 50 STEEM (Jackpot) = 000 = 50 STEEM

2 Correct Digits in the Exact Position:
001 - 009 = 90 STEEM
010 - 090 = 90 STEEM
100 - 900 = 90 STEEM

Running Total: 320 STEEM

Super Number in the First Position:

Need to exclude the numbers above, leaving us with:
011 - 019 = 45 STEEM
021 - 029
031 - 039
...
091 - 099 = 45 * 9 = 405 STEEM

Running Total: 725 STEEM

Super Number Anywhere Else:
Again, exclude the above:
101 - 109 = 9 STEEM
201 - 209 = 9 STEEM
...
901 - 909 = 9 STEEM = 81 STEEM
Double this for 0 at the end = 162 STEEM.

887 STEEM can be won by buying every possible combination.