Originally Posted by irishguy28

The OP is Flying Blue Platinum, so should receive 8 miles per Euro spent on AF/KL.

1500 * 8 = 12,000 miles; presumably the difference is due to the OP's rounding of the cash price paid and/or mileage amount received

Originally Posted by canadavid

from my understanding, all “cash paid” options are eligible for miles earning ?

paid options could be upgrades, seat, luggage, meal, lounge access...