Drawing Exporting and Creating

Ok, I’m trying to create a poster with the regular 8.5 x 11 dimensions. I’ll also need to export in jpg and 300dpi. Im using TB Animate Pro 2, so how would I go about changing the exporting setting to make sure when I print it out its by those properties I wrote above, please reply QUICKLY! o.O

size X desired resolution = pixels

If your original is 8" x 10", you get a result of 2400 x 3000 pixels.