Walmart reported an inventory turnover of $8\mathrm{.}20$ during FY$2023.$ The company's balance sheet says that it started the fiscal year with $$56\mathrm{.}5$b in inventory. How much did Walmart have to pay its suppliers for the raw goods that it sold during FY$2023($answer in billions of dollars$)?$ i$.$e$.,$ what was Walmart's cost of goods sold?