EN 13445-3: Calculation of cone with large end and knuckled area

Help to calculation of the ej og ej' value in EN 13445-3 issue: Cone with large end and knuckled area. As it is stated in the calculation book in different places, that a computer process calculation i recommend, here a simeple program like MS Excel can easily make this calculation for you, the only thing you need in your spreedsheet is to have two ej values, one that is by the equation ej after the book, and they other is for a manuel input, to calculated with in the next steps of the calculation. For specifed help to this or mathematical problems, please contact me by mail, and I will sent a "help" spredsheet showing the calculation. If this blog allows mathamatical formulares, I will post a solution for this problem. But to summerise, do not get scared by some of the suggestions in the book, I have found that you dont need to spend a lot of money in your company for by the calculation softwares, if you have the mathematical skills by forexample mech. eng. It will take a very short time to makes this calculations in forexample in MS excel, I know, I have done it for my company. Look forward to discuss this pressure vessel standard with all of you. Best Regards, Michael.