Need Unique ID from 3 different fields in single expression - Qlik Sense

[JL1996]

Dear all Qlik experts, 

I am new to QlikSense and I am trying to create a unique ID for unique records in a new column or simply output the unique record under certain conditions 

for records with same date and same brand name under the same QR Code will be only counted as one in new column - E

Sample: 

thanks for helping once again! 

[JL1996]

hello there,

thank you so much for your kind assistance! however, I have trouble loading the "AutoNumber" formula on QlikSense. It shows there is an issue with the "right parenthesis"