Related Clues:

• Add a profit margin to
• Cost increaser
• Government's bite
• It's based on purchase price
• Sell at a higher price
• Tea partier's rallying point
• Word that may follow either word in 17-, 20-, 37-, 53-, and 58-Across
• Bill line
• Penultimate line on most bills
• Something levied
• With 6-Down, one in fear of an audit
• Word after sales or income
• Store charge, often
• State add-on
• Government levy