Rewrite 1: make dollar bills cover the paper bills
Rewrite 2: hope coins cover charges
Rewrite 3: ensure pluses equal minuses
Rewrite 4: keep the bottom line above the bottom line
Rewrite 5: make the sums cover the differences
Comments: The origins of this idiom are a little obscure. Are they from bookkeeping or tailoring? How you recast such a cliché may be affected by its origins, although in this instance I've aimed more at its literal meaning.
Check out the searchable alphabetical list of my cliché rewrites with my archived list.