Hi, really hope someone can help me with this one, I don't know VB at all, this is a new challenge for me and cant seem to resolve through web searching...

I am using Excel 2016.

So I have learned how to create an ActiveX listbox, how to populate the listbox and turn on MultiSelect.

My listbox currently shows the "Options" Range Column A (below)

My range of selected cells are;
Column A
Option 1
Option 2
Option 3
Option 4

Column B
Corresponding Numerical Value

What I want to be able to do is when I select say Option 1 and Option 3 or any combination, is to show an output into a specific worksheet cell, the product from the corresponding value of Column B

Eg if I click on Option 1 and Option 3 in the listbox the worksheet cell value would show "2.8" the sum of 1.4 x 2.0

Many thanks in advance for some help on next steps.