Gainesville Cigar stocks Cuban cigars that have variable lead times because of the difficulty in importing the$$ product: Lead time is normally distributed with an average of $7$ weeks and a standard deviation of

$3$weeks. Demand is also a variable and normally distributed with a mean of $250$ cigars per week and a standard deviation of $24$ cigars. $90\%$ service$$ level, what is the$$ ROP?