Suppose your friend has started a new restaurant business that sells burger for $$4\mathrm{.}99,$ sandwich for

$$4\mathrm{.}49,$ tenders for $$3\mathrm{.}99,$ fries for $$1\mathrm{.}99,$ cookies for $$1\mathrm{.}00,$ and soft drink for $$0\mathrm{.}89.$ He requested you

to design an ordering system for his newly established business. For better understating, he has given

the following description