Mainly include material costs, where the prices of metal sheets of different materials and specifications vary greatly; processing cost, such as laser cutting costs are relatively high, while ordinary shearing process costs are lower; equipment depreciation and maintenance costs, the purchase and maintenance expenses of high-precision equipment are higher; labor costs, skilled workers' wages are relatively high, but they can ensure processing quality and efficiency; batch size also affects costs, the larger the batch size, the lower the unit cost, because fixed costs such as mold manufacturing can be shared among more parts.(sheet metal fabrication)