Help needed - With Practice

I need help with asp practice.. Just a code to make the attached picture
What will this code look like. Please kindly refer to attachment
I need to calculate sum of every 2nd number when user inputs a range of numbers in text box
I dont need the html part, just the code for calculating this in asp (regular) ..not .net
thank you.

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Thread moved from the 'VB6 and Earlier' forum to the 'ASP/VBScript' forum

anybody?