A method of assembling shopping carts includes providing a basket defining including rear upright frame members. These preparations contain at least one chemical oxidizing agent and at least one silicone oil. The tradesman’s Card has unique identification features, which identify the card holder as a professional tradesman that is entitled to pre-negotiated discounts. The attaching structure prevents the inner lid from being not attached inadvertently. The present invention employs a transfer-through system for advancing work piece substrates through an integrated apparatus of multiple treatment chambers that control each of the manufacturing processes. A sensor for an analyte comprising the polymer is also described.