vb.net - Delete Item from ListBox and Update Total Visual Basic -

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i new in vb, have managed add items in listbox , update total keep on adding items. question want delete selected items listbox , update total/deduct price, don't know how it. posting sample code used add total.

private sub btncoffee6_click(sender object, e eventargs) handles btncoffee6.click         dim sum double         sum = 1.5         itembox.items.add("regular coffee       $1.00")         x integer = 0 itembox.items.count - 1             sum += val(itembox.items.item(x).tostring)         next         txttotal.text = sum.tostring         itembox.items.add(sum)     end sub

try removeat() , yes tutorial

dim sum double private sub btnremove_click(sender object, e eventargs) handles btnremove.click     itembox.items.removeat(itembox.selectedindex)     sum = sum - val(itembox.items.item(itembox.selectedindex).tostring)             txttotal.text = sum.tostring     itembox.items.add(sum) end sub

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