How does the triangular trade works?

The triangle trade in the 17th and 18th century worked in this way. Ships from New England (from Salem or Boston) would sail from North America to Africa with cargos of rum to be traded for African slaves. From Africa the cargo of Slaves would sail across the Atlantic to the Caribbean where the slaves would be traded for sugar and molasses. The ship would then sail from the Caribbean (say Jamaica) with its cargo of sugar back to New England where the sugar and molasses would be distilled into rum. And then the cycle would repeat itself.