User has created four business lines using the Cost Pools feature. When running the Profit & Loss reports, can the user use the same G/L numbers, but assign different cost pools?
You can attach only one cost pool per G/L account as of now in core. So, if you set up three additional accounts for each of the business lines (activity items) and then assign each to the applicable cost pool, you will be able to generate a P&L showing the four business lines and the consolidated totals. You can create four different activities and assign a different G/L for each one in order to accomplish what you are looking for.
Another option is to use Classes as that is what most businesses set up to find out the total income on a P&L such as wholesale, design, construction, retail, etc. Check out these help articles: