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+clear ;
+clc;
+// Example 2.3
+printf('Example 2.3\n\n');
+printf('Page No. 46\n\n');
+
+// given
+F= 350*10^3;// fuel oils in gallons
+Ci= 5000;// cost of insulation of tanks
+
+As= 7500;//Annual Saving in Pound
+
+if(As> Ci) then
+disp("The investment has a pay-back period of less than 1 year");
+else
+disp("The investment has not a pay-back period of less than 1 year");
+end
+// Note- Since here pack back period is less than 1 year and the company is in profit so they can go with this fuel oil,
+// although it can be noted that there are more problems handling heavy fuels oils 
+//and that the pay-back increases considerably the smaller the installation.
+//So the company can changeover from oil to coal as a fuel.