Plotting Pareto Frontier using VBA

[toshiaria]

We are doing design lab now. we need to decide which vehicles to purchase in future years. we have two key decision criteria: budget and Green House Gas emissions.
cost (thousands) per vehicle GHG emission per vehicle per year
desiel 750 1600
hy-elec 1100 1400
elec 2000 1000
CNG 750 1500
Biodesiel 2500 1050

we have 25 buses, we need to decide to choose which fuels use
We shoud find the solution with lower cost and emission using pareto frontier
how do i use vba to slove it