حاسبة العروض الترويجية

مبادئ الحساب والصيغة الرياضية

Promotion Calculation Logic:
1. Under Single Promotion:
   If Cart ≥ Threshold: Final Cost = Cart - Discount
   Otherwise: Final Cost = Cart
2. Under Multiple Promotions:
   Apply the tier (Threshold) met by Cart value
3. Under Optimal Purchase Plan:
   Simulate and compare:
   Net Cost = (Cart + Additions) - Tier Discount
   Pick Option with Minimum Net Cost.