A jeweler wishes to produce 20 gold rings in one investment-casting operation. The wax parts are attached to a wax central sprue of a 0.5-in. diameter. The rings are located in four rows, each 0.5 in. from the other on the sprue. The rings require a 0.125-in. diameter and 0.5-in.-long runner to the sprue. Estimate the weight of gold needed to completely fill the rings, runners, and sprues. The specific gravity of gold is 19.3.