A financial analyst for Simon Manufacturing prepared the following report: Customers A B a D Customer- Level Operating Income $5,083.00 $4,464.00 $3,113.00 $1,147.50 $984.80 $844.80 $336.60 $252.00 ($168.00) ($676.00) Customer Revenuel $26,250 $30,000 $15,000 $7,300 $5,100 $4,400 $1,800 $4,500 $2,400 $2,600 E F G H What is the cumulative customer-level operating income as a percentage of customer level operating income for the top 4 most profitable (operating income) customers? 17.6% 89.8% 85.1% O 79.1%