To check the total quantity sold by a particular user for products on web, please follow below mentioned steps:
Step 1: Click on Reports.
Step 2: Click on Sales under Bill wise Item Reports and click on Columns and enable the option of Created By.
Step 3: Click on + filters option and select Created by column and you can choose the user now click on Apply.
Step 4: Now you can check the total quantity sold by a particular user for products.
