please help me and also please tell me all the formulas used to find answers or else i will not score anything!!

Jenna Gems makes rings, necklaces, and bracelets and supplies its products to local retail stores. The company has four jewelry makers. Each works 40 hours per week. Each week, the company can procure 60 carats of gems and 600 grams of gold. Other information on their operations is in the table below. One of the company's loyal retailers requires 10 bracelets every week. Use Excel's simplex LP solver tool to help the company determine how many of each product to make to maximize its weekly profits? Bracelet Necklace 3.75 Per Unit Labour hours Gems (carats) Gold (grams) Contribution margin Ring 3.50 1.00 7.00 $850 3.20 0.75 1.50 14.50 $1,200 13.00 $600