Receipt contents:
menu: nm: S-Ovaltine 50%
unitprice: 20,000
cnt: 1
price: 20,000
vatyn: 10% Tax Included
sub_total: subtotal_price: 18,181
tax_price: 1,818
total: total_price: 20,000
cashprice: 100,000
changeprice: 80,000