The Cheyenne Hotel in Big Sky$.$ Montana, recorded its total electrical costs and number of occupancy$-$days over the last year. An occupancy$-$day represents a room rented for one day. The hotel's business is highly seasonal, with peaks occurring during the ski season and in the summer. $[[$Month$,$Occupancy$-$Days,$[[$Electrical$],[$Costs$]]],[$January$,3,568,6,573$