Let’s suppose a large order for 100.000 USD for personal care products (shampoo).
Bought from abroad: 100K USD —> 100% GDP
Bought internally with import substitution: 100K USD –> 180% GDP
Additional local GDP:
5 % taxes(assuming 20% corporate taxes)
25% personnel (payslip + taxes/social)
25% operating and production cost
25% ingredients(base chemicals) costs
20% net profits for company