Receipt contents:
menu: nm: THAI ICED COFFEE
unitprice: @20.000
cnt: 1
price: 20.000
nm: THAI ICED GREEN TEA
unitprice: @22.000
cnt: 1
price: 22.000
sub_total: subtotal_price: 42.000
total: total_price: 42.000
cashprice: 42.000
changeprice: 0