The choice of material depends on the specific needs and requirements of the product you are making. Generally speaking, high-quality materials such as organic cotton, linen, silk, and wool can be more expensive than synthetic fabrics like polyester or rayon. However, the cost can also depend on factors like the source of the material, the manufacturing process, and the quantity purchased.

To calculate the costing, you will need to take into account several factors such as the cost of the raw materials, labor cost, production overheads, and any additional expenses such as shipping and handling. You will also need to consider the profit margin you wish to make on the product.