Following your exhibit analysis, the COO shares that Hartwell's average store runs 4,000 labor hours per month at a fully loaded cost (meaning total compensation including benefits) of $25 per hour. She believes scheduling improvements could reduce hours per store by 20% without impacting customer service levels. Assume 100 stores and 12 months in a year. How much annual savings does this represent, and what would be the margin impact if Hartwell's total annual revenue is $600M?