What make a product fall into "Dead D class"

Products are categorised into four classes based on profit and sales performance:

Class A (Winners): High profit and consistent sales (≈70% of sales velocity).
Class B (Contenders): Reasonable profit and good sales (≈20% of sales velocity).
Class C (Underperforming): Lower ROI (≈10% of sales velocity).
Class D (Dead): Negative profit or no sales at all. Note: Newly launched items also start in Class D until their first sale.

A product is placed in Class D only if it records zero sales for the entire selected date range.

So What makes a product fall into Class D (Dead)?

Example Scenario

Date Range: July 1 – July 31
Product: Fry Pan

July 1–13: Fry pan makes sales → temporarily considered Class A (based on this period alone).
July 14–31: Fry pan is out of stock → 0 sales.

Question: What is the fry pan’s class for the full date range of July 1–31?

Answer:
It depends on total sales contribution, but one thing is certain: The fry pan cannot be Class D (since it did record sales).

Its classification will be A, B, or C, depending on cumulative sales compared to total website sales.

Examples

Website sales (July 1–31): $100k
- Fry pan sales (July 1–13): $50k
- Other products: $30k
- Fry pan contributes 50% of total sales → Class A
Website sales (July 1–31): $100k
- Fry pan sales (July 1–13): $30k
- Air fryer sales (July 14–31): $70k
- Fry pan contributes 30% → Class B
- Air fryer contributes 70% → Class A

Key Clarification

The classification system is based only on sales performance within the selected date range.
Out-of-stock periods do not affect classification; only total sales do.