Given the following information, compute the accounts receivable turnover:Line Item DescriptionAmountSales$$135,000$Accounts receivable, beginning of year$18,000$Accounts receivable, end of year$22,000$a$.6\mathrm{.}13$b$.7\mathrm{.}50$c$.6\mathrm{.}75$d$.6\mathrm{.}82$