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See
http://www.jackson8.com/science/relativisticmass.html
For a summary of where I'm at with this if you think you might be able to help.
Thanks!

m - the mass of an ojbect as perceived for a mover by a stationary frame.
mo - the mass of an object as perceived by a mover for the mover.
v - the velocity (as a fraction of c) of the mover...

... or is this the more applicable formula?:
http://www.jackson8.com/science/images/rm.gif
... or is this the same as the 2nd one, above?

I'm making a little headway. I've scrounged up a couple of formulas that apply, but I just don't remember how to use them.

http://www.jackson8.com/science/images/speedmass.jpg
And...

What is the formula for how much mass increase there is based on how fast an item is moving?

Example: If an object of "X"lbs mass at rest is moving at "Y"mph, what is it's mass at that speed?
...