To find out how much Chancey had in her savings account at the end of the month, you can add the initial amount in her account to the total amount of deposits she made during the month.
Initial amount in savings account: 378
Total deposits made: 242
Now, add these two amounts together:
\( 378 + 242 = 620 \)
Therefore, Chancey had $620 in her savings account at the end of the month.