help with excel solver operations management problem

Jason the jeweler makes diamond bracelets, necklaces, and earrings. He wants to work at
most 160 hours per month. He has 800 ounces of diamonds. The profit, labor time and
ounces of diamonds required to produce each product is given below. If demand for each
product is unlimited, how can Jason maximize his profit?Solve the problem in MS Excel

the excel workbook I have so far is attached I just don't understand the formulas!