Will give brainliest to the 1st right answer!!!!

Samantha buys a SMART TV at Best Buy and puts it on her credit card. The TV costs $2,600. If the annual interest rate on her credit card is 21% and she doesn’t have any other charges on her card, how much interest will she owe after 1 month. (Round your answer to the nearest cent if necessary)
a $50.50
b $40.50
c $45.50
d $55.50