Marcelina uses a blendOf white corn and yellow corn to make tortilla chips at her restaurant. She needs to buy 50 kg of corn in total for her next order. White corn cost $.30 per kilogram, yellow corn cost $.15 per kilogram, and she wants to spend $12 total. Here’s a graph that shows a system of equations for the scenario where X is the amount of white corn she buys and why is the amount of yellow corn she buys. What does F represent in this context