How the numbers are calculated
CPM is the price of 1,000 impressions; CPC is the price of one click. With CPM, clicks depend on your click-through rate (CTR). With CPC, impressions depend on CTR the other way round.
Unique reach is impressions divided by average frequency — how many times the same person sees your ad. A frequency of 2–4 is common for awareness campaigns.
Adsun minimums are checked live: CPM and CPC bids, daily budget and the first top-up. Final delivery depends on targeting, creative quality and competition.