Added CRUD to productSuppliers

-add CRUD to productSupplier and changed sqlDatabase so cost is in productSuppliers table

Petstoredata.sql

@@ -85,6 +85,7 @@ CREATE TABLE product (
 CREATE TABLE productSupplier (
     supId INT NOT NULL,
     prodId INT NOT NULL,
+    cost DECIMAL(10, 2) NOT NULL,
     PRIMARY KEY (supId, prodId),
     FOREIGN KEY (supId) REFERENCES supplier(supId),
     FOREIGN KEY (prodId) REFERENCES product(prodId)
@@ -234,16 +235,16 @@ VALUES
 ('Hamster Wheel',  15.00, 5, 'Exercise wheel for small pets'),
 ('Organic Dog Treats', 25.00, 1, 'Natural dog treats');
 
-INSERT INTO productSupplier (supId, prodId)
+INSERT INTO productSupplier (supId, prodId, cost)
 VALUES
-(1, 1),
-(1, 2),
-(2, 2),
-(3, 3),
-(3, 4),
-(4, 5),
-(5, 6),
-(1, 6);
+(1, 1, 35.00),
+(1, 2, 6.50),
+(2, 2, 7.00),
+(3, 3, 90.00),
+(3, 4, 60.00),
+(4, 5, 10.00),
+(5, 6, 18.00),
+(1, 6, 17.50);
 
 INSERT INTO inventory (prodId, quantity)
 VALUES