Final answer:
To find the total amount in Chelsea's account now, add the deposit she made to the interest she earned. The total amount in her account now is $1008.
Step-by-step explanation:
To find the total amount in Chelsea's account now, we need to add the deposit she made to the interest she earned. Chelsea deposited $900 and earned $108 interest, so the total amount in her account now is $900 + $108 = $1008.