Merge remote-tracking branch 'origin/main'

2025-11-04.md

@@ -6,14 +6,13 @@ tags:
   - authorship/original
   - destiny/permanent
   - status/complete
-  - type/minutes
 dg-publish: true
 ---
 # 2025-11-04
 
 ## 2025-11-04 Belle Meade Director Review
 
-#occupational
+#occupational #type/minutes
 
 ### Takeoff Review
 

2025-11-11.md

@@ -50,7 +50,7 @@ every time we were closing out an estimate.
 This is the example I would always give
 while trying to explain it to him.
 
-![[markup-vs-margin]]
+![[markup-vs-margin#Markup vs. Margin]]
 
 ***
 

2026-02-14.md

@@ -0,0 +1,16 @@
+---
+id: 2026-02-14
+aliases: []
+title: 2026-02-14
+tags:
+  - authorship/original
+  - destiny/permanent
+  - status/draft
+  - type/periodic/daily
+dg-publish: true
+weekly: "[[2026-W07]]"
+monthly: "[[2026-02]]"
+quarterly: "[[2026-Q1]]"
+yearly: "[[2026]]"
+---
+# 2026-02-14

markup-vs-margin.md

@@ -12,16 +12,27 @@ dg-publish: true
 ---
 # Markup vs. Margin
 
-**Markup** and **margin** are both terms to describe the percent profit of a sold good or service.
-**Markup** describes an item's profit relative to its cost to the merchant.
-**Margin** describes an item's profit relative to its cost to the customer.
+**Markup** and **margin** describe the profit of a sold good or service in terms of its cost.
+
+$$
+\text{Profit} = \text{Sell Price} - \text{Cost}
+$$
+
+**Markup** describes an item's profit as a fraction of its cost to the merchant.
+
+$$
+\text{Markup} = \frac{\text{Profit}}{\text{Cost}}
+$$
+
+**Margin** describes an item's profit as a fraction of its sell price,
+its cost to the customer.
 
 $$
-\text{Profit} = \text{Sell Price} - \text{Cost}, \quad
-\text{Markup} = \frac{\text{Profit}}{\text{Cost}}, \quad
 \text{Margin} = \frac{\text{Profit}}{\text{Sell Price}}
 $$
 
+## Example
+
 Suppose a product that
 * costs $80 to produce
 * is sold for $100
@@ -32,8 +43,14 @@ $$
 \text{Margin} = \frac{20}{100} = 20\%
 $$
 
-Because of \*waves hands\* finance reasons,
-contractors (and sellers of products and services in general)
+Contractors (and sellers of products and services in general)
 almost exclusively talk about profit in terms of margin.
 Even if someone says "15% _markup_"
 they may still be talking about margin.
+
+## Converting Between Markup and Margin
+
+$$
+\text{Margin} = \frac{\text{Markup}}{1 + \text{Markup}}, \quad
+\text{Markup} = \frac{\text{Margin}}{1 - \text{Margin}}
+$$