To store the sale person information

Class Name: Salesperson	ID: 1	Type: Concrete, Model
Description: Represent the sale person information	Associated Use Case:
Responsibilities	Collaborators
To store the sale person information	None

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Attributes
Int: id	String: name
String: address	Long: phonenumber

Relationship
Generalisation (a-kind-of): NA
Aggregation (has-a): 1. Works On zero or Many Purchase
Other Associations: NA

Class Name: Purchase	ID: 2	Type: Concrete, Domain
Description: Store the information about the purchase being made by the sales person for an Customer	Associated Use Case:
Responsibilities	Collaborators
Keeps the customer information	Customer
Keeps the salesperson information	salesperson
Keeps the vehicle information for purchase	Vehicle
Keeps a reference to the sale invoice when purchase is finalised	SalesInvoice

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Attributes
Customer: customer	Salesperson: salesperson
Vehicle: vehicle	SalesInvoice: invoice

Relationship
Generalisation (a-kind-of):
Aggregation (has-a): 1. Worked on by only one Salesperson 2. Negotiated by zero-or-many Customer 3. Agreed upon by only one SalesInvoice 4. For only one Vehicle
Other Associations: NA

Class Name: Customer	ID: 3	Type: Concrete, Model
Description: Used to represent a customer	Associated Use Case:
Responsibilities	Collaborators
Holds the information about a new customer	None

Back
Attributes
String: id	String: name
String: address	Long: phoneNumber

Relationship
Generalisation (a-kind-of): NA
Aggregation (has-a): 1. Negotiate zero-or-many Purchase
Other Associations: NA

Class Name: SalesInvoice	ID: 4	Type: Concrete, Domain
Description: Represent a sale invoice for a agreed upon purchase	Associated Use Case:
Responsibilities	Collaborators
Holds the information for a trade in vehicle	Vehicle
Holds the information for the trade in allowance against the trade-in-vehicle.	DealerInstalledOptions
Holds the information about the dealer installed option if any
Holds information about other taxes and fees
When sales invoice is finalised, it will hold customer signature as well

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Attributes
Vehicle: tradeInVehicle	Double: tradeInAllowance
Int: id	DealerInstalledOptions[]: installedOptions
Double: finalPrice	Double: taxes
Double: licenseFee	String: customerSignature

Relationship
Generalisation (a-kind-of): NA
Aggregation (has-a): 1. Agreed based on only one Purchase 2. Trade in zero-or-one Vehicle 3. Lists zero-or-many DealerInstalledOptions
Other Associations:

Class Name: Vehicle	ID: 5	Type: Concrete, Model
Description: Represent a new vehicle as well as a trade-in vehicle.	Associated Use Case:
Responsibilities	Collaborators
Hold the information for a new vehicle being sold at the store	None
Hold the information for a trade-in-vehicle if any while making a purchase

Back
Attributes
Int: serialNo	String: name
String: model	Int: year
String: manufacture	Double: baseCost

Relationship
Generalisation (a-kind-of): NA
Aggregation (has-a): 1. Traded in as a part of only on SalesInvoice 2. Sold as a part of zero-or-one Purchase
Other Associations: NA

Class Name: DealerInstalledOptions	ID: 6	Type: Concrete, Model
Description: Represent the dealer installed option	Associated Use Case:
Responsibilities	Collaborators
Holds the information about the installed options provided by the dealer	None

Back
Attributes
String: optionCode	String: description
Double: price

Relationship
Generalisation (a-kind-of): NA
Aggregation (has-a): Listed on zero-or-many SalesInvoice
Other Associations: NA