CP$8-5($Algo$)$ Analyzing Allowance for Doubtful Accounts, Receivables Turnover Ratio, and Days to Collect $[$LO $8-4]$

Robinson Robots and Mathis Incorporated are two of the largest and most successful toymakers in the world, in terms of the products they sell and their receivables management practices. To evaluate their ability to collect on credit sales, consider the following information reported in their annual reports $($amounts in millions$).$

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Fiscal Year Ended:RobinsonMathis$201820172016201820172016$Net Sales$ $3,856$$ $3,131$$ $3,918$$ $1,902$$ $1,968$$ $2,022$Accounts Receivable$1,068674800892972544$Allowance for Doubtful Accounts$121516212322$Accounts Receivable, Net of Allowance$1,056659784871949522$

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Required:

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$1.$ Calculate the receivables turnover ratios and days to collect for Robinson and Mathis for $2018$ and $2017.$

TIP: In your calculations, use average Accounts Receivable, Net of Allowance.

$2-$a$.$ Which of the companies was quicker to convert its receivables into cash in $2018?$

$2-$b$.$ Which of the companies was quicker to convert its receivables into cash in $2017?$