If Function

Hi and hopefully im posting this into rigft area . been away from spreadsheets for a few years and working on various personal items to get myself back into the right though process

currently im doing a personal work data sheet reading call volumes for myself on a dialy basis, i have it set on seperate rows. but ideally id like data on seperate rows but totals in one cell

figured i could possible use a drop down menu and then if function to read the relevant values,,
so what i have is

if A1 is set to display Mon, then reads set values stated

=IF(A4="mon",(K4+L4+M4))

one formula works fine ..however i want this set so that it will read different parameters if a different day is chosen. i can get it in seperate cells but that defeats the object. and cant seem to work out the multriple formula for it to read all in same cell

i tried things like this

=IF(A4="mon",(K4+L4+M4))*or=IF(A4="Tue",(K5+L5+M5))

but didnt work so decided to ask someone smarter . any help would be greatly appreciated

forgive the typos i was on a call when i was typing this

Ah. almost had it but hadnt quite finished the end part of the formula . many thanks for the help much appreciated

the nested formula worked fine