A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
First we need a table with the warehouse capacities:
ABC 500
AMG 1100
TTI 600
Name this table Capacity
Select the cells you want conditionally formatted, with the active cell on row 2.
Create the conditional format using formula
=SUMIFS($C:$C,$A:$A,$A2,$B:$B,$B2)>VLOOKUP($A2,Capacity,2,FALSE)