Calculate Worked hours per week from a client dropdown list

Hello , I am new to excel and only know the basics

I am trying to do a rota for about 40 employees who work either Morning, Lunch,Tea, PM and Nights
With a possibility of seeing upto 6 clients in a shift (Morning, Lunch,Tea, PM)
Visiting Various clients with different needs.
I have a dropdown list in each cell for the (clients) eg - BS , MH , JJ , DD , KB ,WC etc
Client visit times can vary from 15,30,45 minutes to 1,hour and night shift would be 9 Hours.
I can get get it to work for one entry but i am struggling to get more than one to add up
The sum i have used is =(9)*COUNTIF(G5:L5:Q5:V5:AA5,("BS"))

I have used a macro to select multiple items from dropdown list into one cell , this worked fine but i cannot get more than one client eg - "BS" + "MH" + "JJ" etc to add together to give a total hours worked after seven days.

As i said i am only a beginner at excel and any advice will be much appreciated.