What is the cumulative relative frequency of customers willing to spend $21 or less on an impulse buy? Provide your answer below: Dollar Amount Relative Frequency Cumulative Relative Frequency $1 to $7 0.20 0.20 $8 to $14 0.30 0.50 $15 to $21 0.25 $22 to $28 0.20 0.95 $29 to $35 0.05 1.00