When the colonists first arrived in America, they had to rely on imported goods from England because there were no local stores and they lacked self-sufficiency. Over time, the colonies became more self-sufficient by successfully growing crops like tobacco and rice in plantations in the South. As the colonies grew, they started exporting goods back to England and importing fewer goods, though prices of imports increased with new English taxes. After independence, entrepreneurs took extra supplies on wagons to frontier settlements and could charge high prices due to the law of supply and demand given the scarce goods and high demand.