Vulcan Materials Company, the nations largest producer of construction aggregates, is head quartered in Birmingham, Alabama. The company had 2011 sales of 2,565 million USD. Beginning and ending net accounts receivable as of December 31, 2010 and 2011 were 261 million USD and 299 million US, respectively. Compute Vulcans accounts receivable turnover and average collection period for the fiscal year. Assume all sales are on open account.