How would I write this into a contract...?

[Zach Schaar]

How would I write this situation into a contract....

Amount to seller at closing: $2,000.

Amount to back taxes owed: $500

Total Due At Closing From Buyer: $2500

These numbers are just examples to make it easy. But what's the best way to write this stuff into a wholesale contract? Should I do a sale price and then add an adendum for the back tax?

Thank you!