Choose the stock unit explicitly
The selected offers each supply one complete container: one DHC6.7 fluid-ounce bottle, one regular e.l.f.56.5 gjar or one Naturium 88 mLjar. The target tool uses complete containers of the selected exact record. It does not combine a mini with a regular jar or treat a refill pouch as an equivalent unit. The buyer chooses a target; the site does not recommend how much cleanser to keep or how frequently to replace it.
Subtract actual usable matching stock
If a user chooses a target of five selected e.l.f. regular jars and already holds two usable matching jars, the arithmetic gap is three. With one jar per selected selling pack, three whole packs meet that chosen target. This is an example of inventory arithmetic, not a consumption forecast or a recommendation to buy five jars. The user must decide what counts as usable and matching; the tool does not inspect condition, labels or stock.
Keep zero and surplus visible
When held matching stock meets or exceeds the chosen target, the tool returns zero new packs. It does not force a purchase because a product is available or because a shipping threshold exists. Blank, negative, fractional and out-of-range counts remain unresolved. If a future verified offer supplies multiple containers, its pack contents must be updated before a whole-pack ceiling can be calculated. The current tool does not invent a multipack discount or split-pack option.
Do not turn stock into days
No pump volume, scoop mass, use frequency or number of applications is assumed. The result therefore does not promise a month of cleansing or a daily cost. A lower per-unit purchase price can still create unwanted surplus, so review the chosen target before ordering. Inputs stay in the browser and do not connect to a retailer, household inventory or personal routine. Recheck the actual offer and package before paying.
Whole containers are not automatically interchangeable stock
A shelf holding one DHC bottle, one mini balm and one regular e.l.f. jar does not contain three units of the selected regular 59910 record. The target input should count exact usable matching containers, not every cleanser in the room. If a buyer intentionally treats products as substitutes, that is a separate personal or organizational decision outside this calculator. The tool does not make the substitution or sum unlike grams and milliliters into a single stock amount. Its narrow count keeps the output reviewable and prevents a simple arithmetic result from implying a formula or suitability equivalence.
Sources & scope
Checked November 4, 2026. Manufacturer and retailer references support the specific statements. Dated displayed prices are not final checkout quotes, performance rankings or performance testing. This shopping reference does not replace the exact product label or qualified individual advice. Current received labels, formula-version history and independent clinical/content/commerce review remain pending.
DHC US: Deep Cleansing Oil, selected SKU300 ↗
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