U$.$S$.$ Airfilter has hired you as a supply chain consultant. The company makes air filters for residential heating and air$-$conditioning systems. These filters are made in a single plant located in Louisville, Kentucky, in the United States. They are distributed to retailers through wholesale centers in $100$ locations in the United States, Canada, and Europe. You have collected the following data relating to the value of inventory in the U$.$S$.$ Airfilter supply chain:

QUARTER $1($JANUARY THROUGH MARCH$)$ QUARTER $2($APRIL THROUGH JUNE$)$ QUARTER $3($JULY THROUGH SEPTEMBER$)$ QUARTER $4($OCTOBER THROUGH DECEMBER$)$

All amounts in millions of U$.$S$.$ dollars

Sales $($total quarter$)$:

United states $446436424524$

Canada $11172167166$

Europe $61404519$

Cost of goods sold $($total quarter$)488434508569$

Raw materials at the Louisville plant $($end$-$of$-$quarter$)93675790$

Work$-$in$-$process and finished goods at the Louisville plant $($end$-$of quarter$)184124131266$

Distribution center inventory $($end$-$of$-$quarter$)$:

United states $45533458$

Canada $19202024$

Europe $7596$

What is the average inventory turnover for the firm?