details not display after going back from Quote to Configuration

I am beginner in UI side i got this bug after retrieving configuration only one price details is not showing on the page. the code for displaying details is given below:

{{ quotationCostPerHour }}
{{assignment?.option ? assignment?.option.name :
assignment?.valueObj?.value }}

{{val}}{{‘, ‘}}

{{assignment?.option ?
assignment?.option.name : assignment?.valueObj?.value }}