Anna decided to enclose a 400 m² rectangular playground for her daycare. The playground is adjacent to the daycare building and it needs fence on the other three sides. She has an option to construct two sides of the fence by using simple wood planks that will cost $20/meter and the side opposite to the building by using decorative fence panels with a cost of $25/meter. Use x to represent the side of the fence parallel to the building and y to represent the other two sides. Write the cost C for fencing the daycare as a function of xx. Draw a diagram to represent the problem. No need to optimize the cost.