To find the total amount donated by Olivia and Valeria, you simply add the two amounts together:
Olivia's donation: $3,986.00
Valeria's donation: $8,022.00
Now, add them up:
\[ 3,986.00 + 8,022.00 = 12,008.00 \]
Therefore, Olivia and Valeria donated a total of $12,008.00 to charity.