Set a value from a combobox as default.

I have an Excel workbook with 2 sheets.

Calculator
Pricelist

On the Calculator sheet there are 15 comboboxes. (made using insert, form control, combobox) The content of these comboboxes is taken from the pricelist sheet. It is each time the same function. When the user chooses a value in this combobox, he puts in the quantity and automatically the workbook will make a count.

It is important to keep the pricelist in that Excel sheet. I do not wan't to set this price list inside the VBA code.

When this workbook is used, all the comboboxes are chosen. I would like to have a reset command button which allows me to reset all these comboboxes to their initial value.

How can this be done in VBA?

I used this:
ComboBox1_Change.ListIndex = 4
But it does not work.

Thank you.