guys calm down

i was simply wondering how reasonable it would be to package the stuff yourself and how much of the shipping costs would be minimized by doing it....I guess though that the packaging isn't figured into their shipping costs? i always thought that it was...so i suggested that why not package it yourself thus eliminating some shipping costs...
but i'm not talking about bulk delivery so it's not really a concern..if i were shipping furniture or something then it'd be different..but for small things like games or software i'd imagine you could cut the shipping costs IF and only IF the packaging is including in the shipping costs....it is though isn't it? shipping costs do include packaging costs don't they?