Adding to list and Sub total calculations


I am have a list of Products on my ‘Online Delivery app’ However how do i create a grand total of products. and ensure that the Quantity ordered is reflected in the pricing.


Product Price Quantity
Apple 200 5
Fanta 350 2
Whiskey 700 8

Grand Total - 1250

I would like to create the Grand Total Calculation Workflow. But I am very lost. Please help.

ps. I have the information set up in a Repeating Group Displaying My products ordered in a POP up for the shopping cart. If possible can someone give me a really dumbed down explination.


Would it be possible for you to run me through this on a short call?? I am struggling to wrap my head around this.