List Box / Array Problem

[opSpy]

set the scene: i am trying to make a calculator for a postage cost.
Combo's to select product and quantity, cmd button to add to list, combo's index relate to array.

The name of the product gets added to the list, and the price to a text total.

I want to remove individual items, which i can do, BUT i cannot get the total cost to remove that items cost from the total.

I had thought using a dynamic array, and adding the quantity to that as well as the list, but it jsut got too complicated, i am somewhat of a newbee!

ANY ADVICE would be greatly appreciated.

 

[Foada]

Can you post your code? Anything is possible, the problem is I only have one lifetime.

 

[opSpy]

This is my code to display the item in the list box, and total the price:
lstProducts.AddItem cboProduct.List(RowPostChgArr) & " To: " & cboDestination.List(ColPostChgArr) & " @ GBP £" & PostChgArr(RowPostChgArr, ColPostChgArr)

txtCost.Text = Format(Val(txtCost.Text) + PostChgArr(RowPostChgArr, ColPostChgArr), "0.00&quot

but how do i remove the cost of one of these items, after different item s have been entered??