what do values of x 4 in April 30th, and highlighted x 2.5 for July 15 and 5.5 numbers repersent in this question?

BE10-2 Pierce Corp. has a December 31 year end. It received its property tax invoice of $36,000 for the calendar year on April 30. The invoice is payable on July 15. Prepare the journal entries to record the property tax on (2) April 30, (b) July 15, and (c) December 31, assuming the company adjusts its accounts annually. (a) Apr. 30 Property Tax Expense ($36,000 + 12 * 4)....... 12,000 Property Tax Payable. 12,000 (b) July 15 Property Tax Payable. Property Tax Expense ($36,000 + 12 x 2.5). Prepaid Property Tax ($36,000 = 12 * 5.5) Cash ..... 12,000 7,500 16,500 36,000 (c) Dec. 31 Property Tax Expense. Prepaid Property Tax. 16,500 16,500