Revenue
The amount of Sales that a business generated over a time period. It is at the top of the Income Statement. If you sell 10 flowers for $1, you generated $10 in Revenue.
In the room
Every projection model starts here, so every interview conversation about a company starts here too. Know the difference between revenue and cash collected — a company can book revenue it hasn't been paid for yet, which is exactly the confusion interviewers probe with accounts receivable and deferred revenue questions.