Receipt contents:
menu: nm: Viet Milk Coffee
cnt: 1
price: 29.000
sub_nm: +L +Ice
nm: Viet Milk Coffee
cnt: 1
price: 25.000
sub_nm: +lce +M
sub_total: subtotal_price: 54.000
total: total_price: 54.000
cashprice: 56.000
changeprice: 2.000