Option strategy payoff using excel?

I just loved the webinar on the subject how to create option strategy payoff using excel by Kartick. While i was working on some strategy payoff, for Neutral Calender Spread, Long Call Ladder and Long Put Ladder my charts have not come right. Kartick can you please explain this strategies too.

Have you checked out the options strategies module on Varsity.

Already i have checked out the option strategy modules at varsity but the above mentioned strategies have not explained. Even i tried to work on myself but my payoff charts are not coming correct in excel on the strategies Neutral Calender Spread, Long Call Ladder and Long Put Ladder.

can you provide the excel used in the video:-https://www.youtube.com/watch?v=pVKfIxVw0Og