Hello. i have this formula in a cell =O$13*O$6 in the row below I have =O$14*N$6 and then it follows this pattern going down the column. I want to be able to change the O13 to a different starting point and then copy it down, for example, O20, O21, etc. The problem is that I don't want to change the second part of the reference (which goes backwards and is fixed on row 6). Is there any way to do this other than manually?