In april, Alexander inc. had $3,875 million in sales and $990 million in accounts receivable. For the same period, mattel had $4,595 million in sales and $834 million in account receivable. calaculate the days sales uncollected for both companies. a) which company appears to be doing better job in managing collection of its receivables (all other things assumed to be equal)? b) explain and justify your answer with calculation of at least two relevant ratios you have learned in this course?