.Martin Company uses the aging method to adjust the allowance for uncollectible accounts at the end of the period.At December 31,2014,the balance of accounts receivable is $210.000 and the allowance for uncollectible accounts has a credit balance of $3,000(before adjustment).Ag analysis of accounts receivable produced the following age groups: Current 60 days past due Over 60 days past due $150,000 50,000 10.000 $210,000 Based on past experience, the company estimates that the percentages of accounts that will prove to be uncollectible within the three groups are 2%8%and20%% respectively.Based on these facts,the adjusting entry for bad debt expense that should be made in the amount of $3,000 b.$6.000 C.! 0006$ d. $13.000