8.9) PV Installation Decision (cont'd)

The complete calculate-balance-and-decide procedure should now looks like:

to calculate-balance-and-decide
   let total-cost PV-cost-per-m2 * roof-size
   set PV-output insolation * patch-quality * PV-efficiency * roof-size
   let generation-cost-per-kWh total-cost / (PV-output * PV-lifetime)
   let avoided-cost-per-kwh grid-electricity-costs
   if generation-cost-per-kWh < avoided-cost-per-kwh [
      set PV true
      set color red
      set PV-age 0
   ]
end