Analyze the financial performance of Procter & Gamble Co. using the income statements for the years ended June 30, 2022, and 2021.

Procter & Gamble Co.	2022	2021
Sales	$80,187	$76,118
Cost of Goods Sold	$37,484	$34,987
Gross Profit	$42,703	$41,131
Operating Expenses	$24,905	$23,764
Net Income	$18,828	$16,361

Requirements:

1. Calculate the gross profit margin for each year.
2. Calculate the operating profit margin for each year.
3. Compute the net profit margin for each year.
4. Analyze the changes in Procter & Gamble Co.'s profitability from 2021 to 2022.