Can you use multiple click functions with one script?

trying to set up multiple click functions from one script, then add that script to the various game objects. I am trying to set up a script that checks if variable 1, in this case its called techpoints in my script. if they have 50 I want to be able to buy a virus and subtract those points. I got it working, but i realized that i had to keep inheriting back to check for the variables that i was using as the currency to purchase the new ones. I thought it might be easier to set it all up in one script, but when i did that nothing seems to work. I added the scrip to the 2 different game objects, and selected the different variables on each one. here is my script. can anyone tell me what im doing wrong, or if there is a much better way to do this?

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class BuildVirus : TPB  {
 
 
 //    public UnityEngine.UI.Text TPC;
     public UnityEngine.UI.Text TechPoints;
     public static float techPoints = 0.00f;
     public float techPointsPerClick = 1;
 //    private Slider mySlider;
 //    public float counter = 10.0f;
     public int click;
     public int VirusCost ;
 //    public VirusClick click;
   //  public UnityEngine.UI.Text vpc; 
     public UnityEngine.UI.Text VirusCount;
     public float virus  = 0.00f;
     public int virusPerClick = 1;
 
 
     void Start(){
 
     }
 
     void Update(){
 //        VirusCount.text = "Virus Count: " + virus;
 //        TechPoints.text = "Tech Points: " + techPoints;
     //    vpc.text = "VPC: " + virusPerClick;
         Debug.Log ("techPoints:" + techPoints);
     }
 
 
 
     public void Clicked(){
         VirusCost = 50;
     //    Debug.Log("techPoints before:"+techPoints);
             if(techPoints >= VirusCost){
             techPoints -= VirusCost;
 
             virus += 1;
             }
     //    Debug.Log("techPoints after:"+techPoints);
             
         }
 
     public void TechPointsClicked(){
         techPoints += techPointsPerClick;    
         {
 
     
     }
     }
 }