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How u got 179?

it is simple sume of value of letters using simplest known encryption a=1 b=2 etc. and added value for @ on example newwhan as example and rest that have 1xx so my must be over 100 too.Probably this question is too hard/time consuming for me.or i will try again if it is possible.

easier is decode PIN number to credit card aside of doing this one.So i need some luck or someone give me advice how it can work.