Oliver works as a manager at a local supermarket and earns 100 dollars for every two days, then his total earnings for 12 days isdollars.

In every two days Oliver earns 100 dollars.
Let's create a table for the earnings and the number of days. Number of days Earnings

2	4	6	8	10	12
100	200	300	400	500	600

$\therefore$ He will earn 600 dollars in 12 days.