Help on IF on multiple worksheets

Hello all,

I am trying to build a worksheet that will read multiple worksksheets to add/sum up data. The example I have attached shows the "Car Sector" and the 2 services, "PS" and "none", I used an IF statement in column A to read the data for each company, any company with the "PS" written in its name would have had "Services" provided, companies without this we provided "Other".

What I have are multiple sheets such as "Truck Sector", "Airplane Sector" and so on that have similar data as the screenshot and I want to build a worksheet that will list the "PS" (and "Other") services provided such as below in a column but it would have added up for each month the "PS" and "Other" in each of the sheets in the whole workbook....not sure if this is possible?

Car Sector
Truck Sector
Airplane Sector

Hope this makes sense, any help greatly appreciated!