Look like producer its not reliable software

producing things is like selling things in bulk and a package is around 12pcs or 24pcs package of per itemised item it can be calculated but when you receive huge order you need to think over quickness and handling customers better
when I am using this software I need to spend on time on calculating no. of pcs
if it allows to calculate mathematicaly by just highlight mouce or bracket indicates mathematical operation then it makes software more powerful