Starting prices 18th May:
Steem $2.75
SBD $2.21

Will be paying for bids in SBD

$0.32 vote value on this post before bots

My costs = 14.53 SBD or (11.16 Steem)

Guesstimate returns:
15 SBD back = break even / small profit

$28.36 total vote value on 18th May

Notes:
@minnowhelper returned a huge negative ROI and as such has been removed from this list, some help they turned out to be! -50% loss

Ending prices 24th May:
Steem $2.83
SBD $1.82

Received 11.289 SBD and 3.776 SP = Converting to what i paid in (11.289 +5.9 SBD) = 17.2 SBD

Profit = 2.67 SBD = (18% return)