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You can generate a Z2, which is the monthly Z. Technically, the Z2 is the sum of your Z1s. So if you haven't generated it for a few months, it will give you a good length of roll.
Be careful, the memory of a cash register is not infinite, so an annual Z seems difficult... if you don't generate the Z2 for 12 months, it's not guaranteed that the memory won't be saturated.
I hope I have been helpful.
Be careful, the memory of a cash register is not infinite, so an annual Z seems difficult... if you don't generate the Z2 for 12 months, it's not guaranteed that the memory won't be saturated.
I hope I have been helpful.