% change
Different/ original x 100
Market share
Sales of a firm/ Total sales in a market
Price elasticity of demand
% change in QD/ % change in price
Income elasticity of demand
% change in QD/% change in income
Total variable cost
n.o of units sold x VC per unit
Total added value
Sales revenue- Cost of bought in goods and services
Market size
Quantity goods or services produced/period of time
Market growth
New market size- Old market size/old market size x 100
% change in market size
Year 1-Year 0/Year 0