The robinson has the follow current assets and current liabilities for these two years
2010 2011
cash and marketable securities $50,000 $50,000
accounts receivable 300,000 350,000
inventories 350,000 500,000
total current assets $ 700,000 $900,000
accounts payable $200,000 $250,000
bank loan 0 150,000
accruals 150,000 200,000
total current liabilities $350,000 $600,000
if sales in 2010 were $1,2million, sales in 2011 were $1.3 million, and cost of goods sold was 70 percent of sales, how long were Robinson's operating cycles and cash conversion cycles in each of these years? what caused them to change during this time?