1. Apple Inc. reported the following income statement for the year ended September 25, 2023:

Item	Amount (in millions)
Net Sales	$365,783
Cost of Goods Sold	$220,086
Gross Profit	$145,697
Operating Expenses	$55,708
Operating Income	$89,989
Interest Expense	$2,051
Income Before Taxes	$87,938
Income Tax Expense	$18,629
Net Income	$69,309

1. a. Calculate Apple Inc.'s gross profit margin for the year. b. Determine Apple Inc.'s operating income margin. c. Discuss the impact of Apple Inc.'s operating expenses on its profitability. d. Analyze how Apple Inc.'s net income compares to the previous year and its implications.