c is the cost the store pays for the item and 0.85c is 85% price increase the store adds to the item. Which expression is equivalent to c+0.85

After the experience with great britain having a monarchy, the united states realized that everyone needed to have a voice in the government. the fact that americans had no voice was the main reason for the war. thus, they created a democracy, where the people voted for their representatives and the government ruled with the consent of the people.