02 The supply arithmetic
A bottle is a month, which makes every other sum one division
Sixty capsules, two a day, thirty days — and the front of the bottle prints 30 SERVINGS to confirm it.
The supply arithmetic is exact even when the price is not, and on this product it is unusually clean. Sixty capsules, two a day, is thirty days a bottle — and the front of the bottle prints 30 SERVINGS to confirm it. So a bottle price is a monthly cost, a sixtieth of it is the cost of one capsule, and a thirtieth of it is the cost of a day. Whatever number appears at the checkout, those three divisions turn it into something you can compare against anything else you buy monthly.
That is worth saying out loud because most supplements make the sum irritating: the bottle
holds ninety and the label asks for three, or the serving changes after a fortnight. Here
the count, the instruction and the roundel all agree.
The three divisions worth doing at the checkout
The first is the monthly cost, and there is nothing to do, because a bottle is a month.
The second is the cost of a capsule: the bottle figure divided by sixty. The third is the
cost of a day, which is that figure divided by thirty. All three are yours in under a
minute, and between them they turn whatever number appears at the checkout into something
you can hold against every other monthly thing you buy.
How to read the multi-bottle packs against that
The same division works on a larger box: two bottles is 120 capsules, three is 180 and
six is 360. Comparing the four figures tells you what the bulk discount is worth per
capsule, and catches a larger pack that works out dearer per capsule than a smaller one.