Paper - pricePerPound: double - poundsSold: double + Paper() + setPoundsSold(): void + getPoundsSold(): double + setPricePerPound(): void + getPricePerPound(): double + Services() + setHoursNumber(): void + getHoursNumber(): double + setHoursRate(): void + getHoursRate(): double SalesAccount # accountID: double + SalesAccount() + setAccountID(): void + getAccountID(): double Services - hoursRate: double - hoursNumber: double + Supplies() + setSuppliesSold(): void + getSuppliesSold(): double - suppliesSold: double Supplies .