October 29, 2026

Step-by-step formulas and worked Kerala shop examples for calculating gross profit per item, per category and for the whole store, using GST-exclusive figures and accounting for returns and discounts.

What shrinkage in retail means, how to calculate your shrinkage rate with a worked example, the common causes in Indian shops and a practical checklist to reduce it.

A plain-language checklist of the GST invoice format rules under Rule 46: every mandatory field, invoice numbering, B2B vs B2C differences and an annotated sample invoice.