Can you guide me through solving this problem: A farmer has 900 eggs. He placed them on a tray, which holds 30 eggs each. How much will the farmer earn if he sells it for $2.5 per tray?
There are 900 / 30 = 30 trays that hold 900 eggs.
So, the farmer will earn 30 x $2.5 = $75 if he sells it per tray.