Over the week we split cost into four axes — compute (Day 1), storage (Day 2), network (Day 3), governance (Day 4). Heading into the exam, the trap people commonly fall into when recalling this is "memorizing each service's discount options separately." Do that, and one twist of a single keyword in a question topples everything. To properly handle the cost domain (about 20% of the whole SAA) you have to grasp not the individual options but the single way of thinking underneath them