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+//                Case Study:-Chapter 5
+//               2.Pay-Bill Calculations
+CA1=1000;
+CA2=750;
+CA3=500;
+CA4=250;
+EA1=500;
+EA2=200;
+EA3=100;
+EA4=0;
+level=1;
+while(level)
+    printf("Enter 0[zero] for level to end");
+    //Read data
+    level=input("Enter level:");
+    if(level==0)
+        break;
+    end
+    printf("Enter job number, and basic pay\n");
+    //Read data
+    [jobnumber,basic]=scanf("%d %f");
+    //Decide level number and calculate perks
+    select level
+    case 1 then perks=CA1+EA1;
+    case 2 then perks=CA2+EA2;
+    case 3 then perks=CA3+EA3;
+    case 4 then perks=CA4+EA4;
+    else
+        printf("Error in level code");
+        return;
+    end
+
+    house_rent=0.25*basic;
+    //Calculate gross salary
+    gross=basic+house_rent+perks;
+    //Calculate income tax
+    if (gross<=2000) then
+        incometax=0;
+    elseif(gross<=4000)
+        incometax=0.03*gross;
+    elseif(gross<=5000)
+        incometax=0.05*gross;
+    else
+        incometax=0.08*gross;
+    end
+    //Compute the net salary
+    net=gross-incometax;
+    //Print the results
+    printf("%d %d %.2f\n",level,jobnumber,net);
+end
+printf("END OF THE PROGRAM");
+
+
+
+