Jeez. I don't do math on wednesdays, sorry.
To figure out your cost, you're gonna have to price components for yourself in your location. Things cost different amounts depending on where you are. They also cost more or less per unit depending on the volume you buy.
To get a ballpark figure, find out the price of
1 lb of 2400
500 (350 actually) bullets of your choice
400 large magnum pistol primers
figure out the per unit price of each.
e.g.
price of 20 grains of powder
price of 1 bullet
price of 1 primer
assume your brass are free and there ya go. The cost of reloading a round.
NOT counting the infrastructure (press, dies, tumbler, new shoes for your wife, etc) that you needed to buy to get started.
AND not counting your time.
I just picked 20 grains because I load a lot of 44's with 20.5 grains of 2400 just because they work good for me. You can load'em with more or less (or with a completely different powder) and you need to adjust your computations accordingly.
Don't forget to add in the 1.95 that you spend to buy a calculator at walmart.