2. An ice-cream vendor in Oceanside pays $2500 each month in rent & $2500 each month in salaries. Cones are one size only and cost the vendor 30 cents each to make. a) Write an equation for the vendor's monthly costs 'C' if 'x' cones are sold: b) Write an equation for the vendor's monthly revenue 'R' if each cone sells for $3.50: c) Find the monthly break-even point for the vendor: