public ProductQuantity(ProductQuantity pq, int newQuantity) : this(pq.UPC, pq.Style, pq.Size, pq.Width, newQuantity)
 {
 }
 public ProductQuantity(ProductQuantity pq) : this(pq.UPC, pq.Style, pq.Size, pq.Width, pq.Quantity)
 {
 }