BlueJay Company, a calendar year accrual basis taxpayer, has its busy season at the end of the year and typically hires an additional $50$ temporary workers. The temporary workers complete their work by December $31.$ The agency that provided the temporary workers did not provide an invoice by the end of the year. Based on the number of hours worked, BlueJay calculated that the invoice would be $$45,000.$ Therefore, BlueJay accrued a $$45,000$ expense and a $$45,000$ liability for temporary services provided on its financial statements. What amount is deductible on the current tax return?