vault backup: 2026-05-23 01:26:08

2026-05-23 01:26:09 -04:00
parent 1c76bed28e
commit 30bbdb497c
39 changed files with 623 additions and 15545 deletions
@@ -25,6 +25,16 @@ $$
 \text{Margin} = \frac{\text{Profit}}{\text{Sell Price}}
 $$

+$$
+\begin{align}
+\rm Margin &= \rm \frac{(Sell\ Price - Cost)}{Sell\ Price} \\
+\rm Margin \times Sell\ Price &= \rm Sell\ Price - Cost \\
+\rm Cost &= \rm -1 \times (Margin \times Sell\ Price - Sell\ Price) \\
+\rm &= \rm -1 \times Margin \times Sell\ Price + Sell\ Price \\
+\rm &= \rm Sell\ Price \times (1 - Margin)
+\end{align}
+$$
+
 ## Example

 Suppose a product that