Conversion of text value of excel cell into a integer for iteration of cell

Can anyone help me regarding string to number conversion in RPA Express, when I am running a bot for number of product present in captured excel sheet.
Excelcellerror Executionerror

It looks like the bot is trying to convert an empty value. Check if there are empty values in the list “row”.

Also, what is the purpose of having 2 Number Format actions? In the end, you have a string variable in the same format as ${element}.