If I am a manufacturer, it will COST me a certain amount of money produce a phone (materials, labor, packaging, etc.).
In order to make a profit, I sell the phone to a dealer or distributor at a PRICE higher than my cost.
In turn, the manufacturer's PRICE becomes the dealer/distributor's COST. The dealer then turns around and sells it to the consumer for a still higher PRICE.
Bottom line: it depends on your position in the transaction. From the purchaser's point of view, it is a cost; for the seller, the same amount is a price.
You ask a dealer, "What is the price?" Someone else asks you, "What did it cost?"
Not a teacher, but I did stay at a Holiday Inn Express last night (actually, I spent nearly twenty years in a Federal purchasing office).
Student or Learner