Since I see that there is a new line that puts "Discount" and "$ 500" on different lines, I assume that it will be printed on separate lines, and to get a little more space, but not a completely new line, you can use line-height .
In your css:
span#lblDiscount { line-height:180% }
Try approximately 120-200% of the normal line height, and this will put a good distance between the two lines. Hope this helps.
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