Answer: $1449
Step-by-step explanation:
We know that Elissa contributed $105 per month, if you think that in one year there are 12 months, then in one year Elissa contributed:
C = 12*$105 = $1260
And we also know that her employer also matched a 15% of her contributions.
a 15% of a number can be calculated as: 0.15 multiplied by the number, so a 15% of $1260 is equal to: 0.15*$1260 = $189
Then the total amount contributed is: $1260 + $189 = $1449