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Are you sure it's Applecare? Applecare+ for the iPhone 7/7+ is 129.00, spread out over 12 months that comes out to about 11 per month. It's been my experience that Best Buy sells Square Trade coverage, which is different.
EDIT: Ok I did a little more digging and found out that Best Buy DOES now also offer Applecare in addition to Square Trade. Not sure how many months you have to pay AND if they have added value to the plan, that is do they also include, their own geek squad with the Applecare?