You are comparing the accounts receivable turnover ratios of two companies, Company X and Company Y, for the fiscal year 2023.

Company	Net Credit Sales (in millions)	Average Accounts Receivable (in millions)
Company X	$300	$50
Company Y	$500	$80

Requirements:

1. Calculate the accounts receivable turnover ratio for both Company X and Company Y.
2. Compare the efficiency of accounts receivable turnover between the two companies.

Discuss potential implications of the differences in accounts receivable turnover ratios between Company X and Company Y.