contribution per unit
selling price- variable cost per unit
total contribution
= contribution per unit x units sold
profit
total contribution- fixed costs
net cash flow
inflow - outflow
payback
cumulative cash flow value- for the last year of - figures / NCF for the year after X12
ARR
average annual profit - final cumulative cash flow value/ lifetime of project
AAP/ initial cost of investment X 100 = %
higher the % more attractive
NPV
NCF X discount value = present value
NPV= add up all present values - cost of intial investment