On February 1, 2020, a company agreed to construct a building at a contract price of $42,000. The company estimated the project would be finished in 2022. Information relating to the costs and billings for this contract is as follows:

2020 2021 2022

Total costs incurred to date $8,000 $10,000 $22,000

Estimated costs to complete 12,000 6,000 -0-

Customer billings to date 9,000 21,000 29,000

Collections to date 4,000 14,000 25,000

If the company uses the percentage-of-completion method, an inventory/current liability of $___________should be shown on the balance sheet at December 31, 2021 related to the project.