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OCR: Figure 6. "Sale Calculates Its Total" Scenario View (Round III) Sale SaleLineltem Item Store TaxCategory Scenario: Sale Calculates its Total Scenario Constraint: calcTotal calcSubtotal howMuch ForQty getTaxCat getTaxCat 0.1 seconds, 9 out of 10 times, caicSubtotal howMuchinTaxCat getPriceForDate 0.5 seconds max. calcTax howMuchInTaxCat sale.calciotal ( ; total) sale.calcSubtotal ( ; subtotal) sale, Lineltem.calcSubtotal (date ; subtotal) item. howMuchForQty (qty, date ; amt) .... item.getPriceForDate (date ; price) sale.calcTax ( : totalTax) store.getTaxCat ( : taxCategories) // for all tax categories saleslineltem.howMuchinTaxCat (taxCat ; taxAmt) item.howMuchInTaxCat (taxCat ; amt) item. getPriceForDate (date ; price) taxCategory.getTaxRate ( ; rate) ENDO