Oh, I see. You left out the part about signing a new 2yr contract.
After fees and taxes, you're looking about $100per x 24 that's $2400.00.
You might have momentarily gained $80, but you committed to $2400![]()
He already had an iPhone and its safe to assume he will continue having a smartphone so that $2400 is a cost he would have had regardless.
However, you are correct about the 80 not allowing for sales tax, so figure $64 profit.
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