Answer:
$400
Step-by-step explanation:
Given at the end of 2017 estimated warranty payable is $ 1,300
Also given that During 2018, Roy Electric made sales of $ 140,000 and expects product warranties to cost the company 1 percent of the sales
The warranties made in the year 2018 is 
Given that the company already paid $2300 warranties so
Total warranties payable are 1300 + 1400 - 2300 = $400