Share
Paper Unit Price Formula Including Postage Cost Calculation
Published on September 25, 2026
Word-Problem
Learn how to calculate the total unit price of different paper formats by adding the base price per sheet and the proportional postage cost per unit. Follow the step-by-step formula to accurately compare shipping expenses across varying paper weights and quantities.
Question
Unit price formula, including postage price, for different formats of paper
Answer
To calculate the unit price of paper when accounting for postage, you must distribute the fixed cost of shipping across the total number of units purchased.
1. The General Formula
The unit price (
Where:
-
= Total cost of the paper (Base price Number of sheets) -
= Total cost of postage/shipping -
= Total number of sheets (units)
2. Formula by Format (Weight-Based)
Since postage is often determined by weight, the unit price changes based on the weight of the paper format. Let
If postage is calculated by total weight (
Where
3. Step-by-Step Calculation Example
Suppose you are comparing two formats: Standard A4 (80 gsm) and Heavy Cardstock (300 gsm).
Given Data:
- Format A (A4): 500 sheets at
; Postage is . - Format B (Cardstock): 100 sheets at
; Postage is .
Step 1: Calculate Total Cost for Format A
Step 2: Calculate Total Cost for Format B
4. Summary Table for Comparison
To find the most economical format, use this structure:
| Format | Base Price (
|
Postage (
|
Total Sheets (
|
Unit Price (
|
|---|---|---|---|---|
| Format 1 |
|
|
|
|
| Format 2 |
|
|
|
|
Theorems
• General Unit Price Formula
The unit price
• Weight-Based Unit Price Formula
The unit price