What is the gross margin (in %) in the month September? Show your calculations

Coca Cola Company Units Sold (in MILLIONS) Pricing ($) Ad Budget ($ Sales Product Unit MILLIONS) Force Size Cost ($) Company Expenses ($ MILIONS) JANUARY 100 3.2 100 3000 2 200 February 120 3.3 110 3500 2.1 210 MARCH 130 3.3 120 4000 2.2 220 APRIL 150 3.4 130 4000 2.1 230 MAY 180 3.4 100 4100 2.5 200 JUNE 230 3.6 120 4200 1.9 220 JULY 300 3.7 130 5000 2 230 AUGUST 310 3.75 150 4500 2 250 SEPTEMBER 280 3.5 140 4300 2.1 240