Answer:
$18,195
Step-by-step explanation:
The computation of the net realizable value is shown below:
As we know that
Net Realizable Value of Receivables = Ending Accounts Receivable - Estimated Uncollectibles amount
where, 
Ending balance of Accounts Receivable is
 = Revenue on Account - Accounts collected 
= $90,500 - $71,400
= $191,00
 And, 
Estimated Uncollectibles i.e Bad debt Expense is 
 = Revenue on Account × given percentage 
= $90,500 × 1%
= $905
 So, the net realizable value is 
= $19,100 - $905
= $18,195
We simply applied the above formula