Property Name	Type	Required	Description
`quantity`	integer	Required	Item quantity being purchased.
`tax-code`	string	Optional	Tax code for the item being purchased. If not provided, the value defaults to the code for tangible personal property (tpp).
`description`	string	Optional	Line item description.
`amount`	decimal	Required	The cost of the line item.
`item-code`	string	Required	Unique ID for the line item.

Property Name	Type	Description
`quantity`	integer	Item quantity being purchased.
`tax-code`	string	Tax code for the item being purchased. If not provided, the value defaults to the code for tangible personal property (tpp).
`description`	string	Line item description.
`amount`	decimal	The cost of the line item.
`item-code`	string	Unique ID for the line item.
`tax`	decimal	Tax for the line item.