I am a travel agent and I cannot figure out where to enter the 'cost of goods sold' in Turbo Tax 2020. eg. I purchase a Travel package(s) and re-sell them. Help!

eg. If I buy a Group package for $20,000 and sell it for $24,000 I need to enter the $20K expense to offset the actual profit of $4K and I cannot figure out where to enter it.