Practical operator guides
These guides are analytical companions to MarginKit calculators. Each one includes worked scenarios, comparison logic, and decision takeaways you can apply before changing price, placing purchase orders, or adjusting inventory policy.
Use by workflow
Start where the operational risk is highest
Choose a guide, then validate the same scenario in calculators.
Guides
Current analytical guides
Focused resources for operators who need decision support beyond one-click calculations.
How to Calculate Landed Cost for Imported Products
Step-by-step landed-cost analysis with scenario comparison and fee-sensitivity chart for import pricing decisions.
Practical angle: Shows how shipping, duty, VAT, and handling charges move true per-unit cost.
Helps with: Setting price floors and avoiding margin leaks before listing products.
Use with calculators
How Discounts Affect Profit Margin
Operational discount economics guide covering margin compression, required volume lift, and promo decision thresholds.
Practical angle: Compares 5% to 20% discount depth and quantifies when revenue growth still harms profit.
Helps with: Choosing safer promo depth, bundle strategy, and margin-protection rules.
Use with calculators
How to Calculate Reorder Point with Lead Time
Inventory planning guide with lead-time demand logic, demand scenarios, and reorder threshold sensitivity analysis.
Practical angle: Shows how daily sales, lead-time assumptions, and safety stock policy shift reorder timing.
Helps with: Reducing stockout risk and setting more realistic SKU-level reorder alerts.
Use with calculators
Landed Cost vs Product Cost
Comparison guide that quantifies how supplier-cost assumptions diverge from fully loaded landed-cost reality.
Practical angle: Highlights underpricing risk created by omitted shipping, duty, tax, and handling layers.
Helps with: Correcting price-floor errors and validating import unit economics before launch.
Use with calculators
How to Calculate Profit Margin After Shipping and Fees
Progression-based margin analysis showing how shipping, payment, and variable costs compress real profitability.
Practical angle: Stages margin from paper view to fully loaded view to expose where contribution weakens fastest.
Helps with: Setting safer price floors, promo thresholds, and fee-aware margin targets.
Use with calculators
Safety Stock Formula for Ecommerce Sellers
Risk-threshold guide for sizing safety stock under stable, moderate, and high-volatility demand conditions.
Practical angle: Shows how demand and lead-time volatility move buffer requirements and reorder thresholds.
Helps with: Balancing stockout prevention against overstock and working-capital pressure.
Use with calculators