A calendar is determined by using each of the 12 faces of a regular dodecahedron for one month of the year. With each side of the regular pentagonal face measuring 4cm, the area of each face is approximately 27.5 cm 227.5 cm².
a) What is the total surface area of the calendar?
b) If the material used to construct the calendar costs 0.8 cent per square centimeter, what is the cost of the materials used in construction?