Sera went to the mall and made four purchases. she spent $2.85,$5.11,$7.89and $4.15 use mental math to determine how much money sera spent at the mall

Sera spent $20 at the mall.

Step-by-step explanation:

Given:

Sera went to the mall and made four purchases.

She spent $2.85,$5.11,$7.89and $4.15.

Now, to determine the money Sera spent at the mall.

Sera made four purchases of:

$2.85,

$5.11,

$7.89,

$4.15.

Now, by adding we get the total money she spent:

Therefore, Sera spent $20 at the mall.

answer: i think its b