Answer:
fixed ratio; variable- interval
Explanation:
Fixed ratio as it pertains to this question means that chuck is paid for his job as agreed by the union and the organization. i.e for every 15 widgets, he is paid $10.
Sally on the other hand is paid whenever the company makes money which means that Sally's payment is not constant like Chuck's. This is because she is not a part of the union.
Cheers. s