Excel Spreadsheet Question

Hi everyone.

I'm trying to do a audit on my company taxes - and I'm using EXCEL.

I am an Arts grad - meaning I can find a million excuses - but can't calculate or use a spreadsheet to save my life.

I'm trying to fit in a formula to auto calculate column K. Instead of trying to calculate each row individually.

I can put in the formula

=+H18+I18+J18 to calculate Chip Application in Row 18. and I guess I can do it manually by changing the formulae and working my way downwards.

But I'd rather just put in a general formulae which works it out. Know what I'm talking about??

Anyone familar with EXCEL - and can help me out??