[users] Open office Calc

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I am using open office calc, and I need to know how should I copy a formula 
keeping constant any value. Because when I am copying a formula values like 
"$RES.H5*$´4´.H5+... CHANGES TO "$RES.J5*$´4´.J5+... AND I WNAT TO KEEP 
CONSTANT H5 AND CHANGE ´4´ TO ´5´ AND I CAN´T DO IT.
I will thank you a lot if you could give me the solution.
William