Data Sufficiency (DS) | Re: The first four digits of the six-digit initial password for a shopper'

Dear itoyj
dates needs to be positive, but the tens digit of it can be zero.
if CD is the two-digit representing the month,
then January is 01 (where C = 0 and D = 1)
and December is 12 (where C = 1 and D = 2)

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