Presented here are summarized data from the balance sheets and income statements of Wiper Incorporated:

WIPER INCORPORATEDCondensed Balance SheetsDecember $31,2023,2022,2021($in millions$)202320222021$Current assets$ $650$$ $900$$ $700$Other assets$2,7502,0501,750$Total assets$ $3,400$$ $2,950$$ $2,450$Current liabilities$ $500800$$ $700$Long$-$term liabilities$1,5001,000800$Stockholders' equity$1,4001,150950$Total liabilities and stockholders' equity$ $3,400$$ $2,950$$ $2,450$

WIPER INCORPORATEDSelected Income Statement and Other DataFor the Years Ended December $31,2023$ and $2022($in millions$)20232022$Income statement data:$$Sales$ $3,300$$ $2,900$Operating income$380300$Interest expense$8070$Net income$300230$Other data:$$Average number of common shares outstanding$4442$Total dividends paid$ $50$$ $30$

Required:

Calculate return on investment, based on net income and average total assets, for $2023$ and $2022.$

Calculate return on equity for $2023$ and $2022.$

Calculate working capital and the current ratio for each of the past three years.

Calculate earnings per share for $2023$ and $2022.$

If Wiper's stock had a price$/$earnings ratio of $14$ at the end of $2023,$ what was the market price of the stock?

Calculate the cash dividend per share for $2023$ and the dividend yield based on the market price calculated in part e$.$

Calculate the dividend payout ratio for $2023.$

Assume that accounts receivable at December $31,2023,$ totaled $$310$ million. Calculate the number of days' sales in receivables at that date.

Calculate Wiper's debt ratio and debt$/$equity ratio at December $31,2023$ and $2022.$

Calculate the times interest earned ratio for $2023$ and $2022.$