At the end of 2015, murray state lenders had a balance in its allowance for uncollectible accounts of $4,500 (credit) before any adjustment. the company estimated its future uncollectible accounts to be $12,000 using the percentage-of-receivables method. murray state's adjustment on december 31, 2015, to record its estimated uncollectible accounts included a: - credit to allowance for uncollectible accounts of $7,500.- credit to allowance for uncollectible accounts of $12,000.- debit to bad debt expense of $7,500; credit to allowance for uncollectible accounts of $7,500.- debit to bad debt expense of $7,500.