Automobile racing, high$-$performance driving schools, and driver education programs run by automobile clubs continue to grow in popularity. All these activities require the participant to wear a helmet that is certified by the Snell Memorial Foundation, a not$-$for$-$profit organization dedicated to research, education, testing, and development of helmet safety standards. Snell $"$SA$"($Sports Application$)$ rated professional helmets are designed for auto racing and provide extreme impact resistance and high fire protection. One of the key factors in selecting a helmet is weight, since lower weight helmets tend to place less stress on the neck. The following data show the weight and price fo $18$ SA helmets $($SoloRacer website$).$

$\backslash$table$[[$Helmet$,$Weight $($oz$),$Price $($$$)],[$Pyrotect Pro Airflow,$64,240],[$Pyrotect Pro Airflow Graphics,$64,268],[$RCi Full Face,$64,200],[$RaceQuip RidgeLine,$64,191],[$HJC AR$-10,58,301],[$HJC Si$-12,47,706],[$HJC HX$-10,49,901],[$Impact Racing Super Sport,$59,347],[$Zamp FSA$-1,66,209],[$Zamp RZ$-2,58,290],[$Zamp RZ$-2$ Ferrari,$58,307],[$Zamp RZ$-3$ Sport,$52,488],[$Zamp RZ$-3$ Sport Painted,$52,483],[$Bell M$2,63,374],[$Bell M$4,62,364],[$Bell M$4$ Pro,$54,563],[$G Force Pro Force $1,63,242],[$G Force Pro Force $1$ Grafx,$63,282]]$