Fiona cleans offices. She is allowed 5 seconds per square foot. She cleans building A, which is 2,916 square feet, and building B, which is 2,352 square feet. Will she finish these two buildings in an 8-hour shift? Will she have time for a break? Round intermediate calculations to two decimals and final answer to whole number. minutes. she finish in an 8-hour shift, and she ( have a break of