How can I format the Number field that's calculating a Product Price and a Quantity? I'm not so concerned with the dollar sign but I would like to have 2 decimal places to show in my Subtotal field when the user changes the Quantity. I have the Rounding set to 2 but if there are trailing zeroes they get cut off.

Calculation of $5.25 x 2 = 10.5 (Should show as 10.50)