Combinations are like portmanteau tasks, each potentially holding a pointer or pointers to the list
lines contained in it. They are currently used only for fixed price quoting, but will be soon used in
'on-line style' quoting, when their true power will be more apparent.
When setting quantities in combinations, please bear in mind that the supplementary is always
taken as being for 1000 single A4 100gsm leaves printed one side. All task lines will be pro-rata'd
appropriately from the quantity you enter.