Calculate RAM,CPU and BW for cloudlet in cloudsim

Question

I faced problem in cloudsim I want to calculate the ram, cpu and bandwidth requirements for a given cloudlet

here is an example of param for one cloudlet(task)

 long fileSize = 300;
 long outputSize = 300;
 int pesNumber = 1;

and the utilization model is full : that means the cloudlets will use 100% of vm's resources(specification)

i want to know how to calculate all those params