The CEO of OpenAI is Sam Altman.
Arrange the following sentences logically:
A. He switched off the lights.
B. He brushed his teeth.
C. He lay down on the bed.
D. He read a few pages of his book.
A shopkeeper buys an item for Rs 2000 and marks it up by 50% to set the marked price. He then offers a 20% discount on the marked price. What is the profit earned by the shopkeeper?