Cars arrive to the drive$-$thru of a local Chick$-$Fil$-$a every $241$ seconds on average with a standard deviation of $221$ seconds. The time it takes the restaurant to take the car's order, process payment, and fill the order is $159$ seconds on average with a standard deviation of $155$ seconds. To simplify the analysis, treat the restaurant as a single server that works on one drive$-$thru order at a time on a first$-$come$-$first$-$serve basis.

Calculate the average time in seconds a car spends waiting to begin placing its order.

Carry intermediate calculations to at least $3$ decimal places.

Enter your final answer rounded to one decimal place.