# Piece size

A piece size is a quantity in economics that considers an otherwise overall recorded quantity per piece (e.g. per product unit). As a result, completely different extreme points of the curve shape are often found.

A distinction is made between the following piece sizes:

• costs ${\ displaystyle K}$ • Unit cost ${\ displaystyle k}$ • variable unit costs: ${\ displaystyle k_ {v} = {K_ {v} \ over x}}$ • Fixed unit costs: (see also fixed cost degression )${\ displaystyle k_ {f} = {K_ {f} \ over x}}$ • total (average) unit costs: ${\ displaystyle k_ {f} = {{K_ {f} + K_ {v}} \ over x}}$ • proceeds ${\ displaystyle E}$ • Unit revenue ${\ displaystyle e}$ • fixed unit revenue: ${\ displaystyle e_ {f} = {E_ {f} \ over x}}$ • variable unit revenue: ${\ displaystyle: e_ {v} = {E_ {v} \ over x}}$ • total (average) unit revenue:${\ displaystyle e = {{E_ {f} + E_ {v}} \ over x}}$ • Profit
• Unit contribution margin :${\ displaystyle db = {DB \ over x}}$ • average unit profit: ${\ displaystyle g = {{DB + E_ {f} -K_ {f}} \ over x}}$ 