[slantyyz]

>> Just because revenue is reinvested doesn't mean it isn't revenue or a margin.

Your sentence is a little confusing, because calling something revenue means it is revenue. And while related, revenue is not the same as margin.

And please note that the bill of materials for a phone is only a part of the cost of goods sold, which as mentioned by others, also includes manufacturing, assembly, marketing, r&d and other costs. Those costs are generally not considered to be "reinvestment".