An insulator is installing fiberglass insulation in exterior walls that total up to​ 1,623 square feet after windows and doors are deducted. Each roll can insulate 49 square feet. There are 28 rolls on hand. Will this amount be​ sufficient? If​ not, how many total rolls are​ needed? If​ necessary, round your answer up to the nearest whole​ number, since you cannot buy part of a roll of insulation.