right now in the latest ios version you select your currency and then type in your price. the price box defaults to 0.00 with a regular style keyboard. you need to delete the 0.00, then switch to the numbers section of the keyboard, then enter your price.

it should default to blank (or become blank when tapped on to enter a value), and default to the numbers only keyboard, this is an option as i have seen numerous apps use it. Since there will be no letters or characters other than decimal in this box, it would be significantly more efficient to do it this way.