Martha has planted 4 root vegetables to make chili to enter into The Southwest Chili Cook-off. Each vegetable that she plants has a 50% chance of successfully growing independent of the other vegetables. For each unsuccessful vegetable, she will have to use canned vegetables, which will be much less tasty, and result in less prize winnings for Martha. The table below shows how much Martha will win in the cook-off based on the number of successfully grown vegetables. What is Martha's expected winnings from The Southwest Chili Cook-off? Round your answer to the nearest cent.