Margolo Company makes cross-country skis. The company controller wants to calculate the fixed and variable costs associated with janitorial services incurred by the factory. Data for the past 6 months were collected.

Janitorial Labor Month cost hours January $9,20010,120 February8,8009,500 March9,35010,500 April9,62011,100 May8,4008,660 June9,40010,650

Select the correct set of high and low months.