This document contains a case study about a guest house called Cloud Nine and examples and questions related to mathematical literacy concepts like rates, percentages, ratios, fractions, measurement, and data interpretation. Some key details include that Cloud Nine charges lower rates on weekends to attract more guests, a double room can accommodate two people more economically than a single room, and the owners are making plans and calculations for an expected busy period during the 2010 Soccer World Cup when occupancy could reach 100%.