Answer: 
 
Allowance for Doubtful Accounts 69,000 
 
 
Explanation: 
 
If the company estimates its bad debt to be 2% of net credit sales: 
 
 
sales 2,500,000 
 
return and allowance (50,000) 
 
 net sales 2,450,000 
 
Then, we calculate 2% of this amount: 
 
2,450,000 x 0.02 = 49,000 
 
As the uncollectible amounts are related to sales rather than account receivable we adjust for the full value giving an ending value of: 
 
beginning 20,000 + adjustment 49,000 = 69,000