Price ratio before transaction unit marginal income = unit sales income _ unit cost.

UnitContributionMargin (C) is equal to unit sales revenue (P) minus unit cost, and ContributionMarginRatio reflects sales.

Pricepershare, the par value is the par value of the stock, and the par value of China stock is 1 yuan. Issuance can usually use a premium (that is, higher than the face value), so that the face value loses its original meaning. Marketvaluepershare, market value refers to the price of a stock in the market after listing.