Iterate recursively, The Real Acme, Inc. obviously also operated in the EU, they made a revenue of $25MM from goods and services they sold to Acme EU, Inc., the

Iterate recursively, The Real Acme, Inc. obviously also operated in the EU, they made a revenue of $25MM from goods and services they sold to Acme EU, Inc., therefore they owe taxes on global_profit * $25MM / ($25MM + non_EU_revenue). I admittedly didn't really think this through for more than a minute. This also feels like I am reinventing value-added tax, this is definitely not my area of expertise.