bus equations

• gross profit 


  revenue - cost of sales (variable costs)
• gross profit margin


  (gross profit/ sales revenue )x100
• net profit

  revenue - total costs
• net profit margin 


  (net profit /revenue ) x100
• average annual profit (AAP)


  (total profit- cost) /n. of years
• APR

  (AAP/cost of investment) x100
• breakeven

  fixed costs/ ( price- variable costs)