hi friends,
i'm looking for a solution for my problem... the situation is; i have a huge number of rows and i want to add some data like this:
A1+A6+A11+A11+A16+A21+A26+A31+A36.... and goes on with an increment of 5 cells. but inserting this to the formula bar is very time consuming. i hope there is an easy way of doing this. and i will be very glad to hear it from you. by this way i can spend the time which i gained from this job by praying for you )

thank you guys, waiting for your replies...