Start with the customer and the commercial decision
The useful starting point is the Amazon.com business, not a blended North American dashboard. A Canadian brand may discuss performance in CAD while the advertising account and US selling reports use USD. I establish how those views relate before comparing returns or recommending a campaign target. Your finance owner approves any conversion method and the treatment of product costs.
I then trace responsibility from the Canadian commercial team to the people managing campaigns and US availability. If a campaign promotes a variation awaiting replenishment, another bid change may not resolve the problem. The brief connects account structure, source reporting and inventory ownership so the recommendation reaches the person who can act on it.