In $2001,$ Berkshire Hathaway's total assets in the Insurance and Other segment were approximately $17\%$ of the level they were in $2021.$ Assuming that cash and cash equivalents represent the same proportion of assets, other than marketable securities or equity method investments in $2001$ as in $2021,$ approximately how much did Berkshire Hathaway report in $2001$ for cash and cash equivalents? ASSETS $($in millions$)$ Insurance and Other: $2021$ Deferred charges $-$ retroactive reinsurance $10,639$ Equipment held for lease $14,918$ Other $15,854$ Investments in fixed maturity securities $16,434$ Equity method investments $17,375$ Loans and finance receivables $20,751$ Property, plant and equipment $20,834$ Inventories $20,954$ Other intangible assets $28,486$ Other receivables $35,388$ Goodwill $47,117$ Short$-$term investments in U$.$S$.$ Treasury Bills $58,535$ Cash and cash equivalents $85,319$ Investments in equity securities $350,719743,323$