please solve the problem b and explain the processes. thank u so much

Cooper River Glass Works (CRGW) produces four different models of desk lamps as shown on the flowchart. The operations manager knows that total monthly demand exceeds the capacity available for production. Thus, she is interested in determining the product mix which will maximize profits. Each model's price, routing, processing times, and material cost is provided in the flowchart. Demand next month is estimated to be 175 units of model Alpha, 250 units of model Bravo, 150 units of model Charlie, and 275 units of model Delta. CRGW operates only one 8 hours shift per day and is scheduled to work 20 days next month (no overtime). Further, each station requires a 10% capacity cushion (that is only 90% production time is available). Step 4 Alpha $10 Step 1 Station 1 (10 min) Raw materials Step 2 Station 2 (5 min) Step 3 Station 3 (15 min) Station 4 (10 min) Product: Alpha Price: $65/unit Demand: 175 units/month Bravo $10 Step 1 Station 2 (20 min) Step 2 Station 3 (10 min) Product: Bravo Price: $85/unit Demand: 250 units/month Raw materials Step 1 Charlie $8 Station 1 (5 min) Raw materials Step 2 Station 2 (15 min) Step 3 Station 3 (5 min) Step 4 Station 4 (20 min) Product: Charlie Price: $80/unit Demand: 150 units/month Step 3 Step 4 Delta $5 Step 1 Station 1 (20 min) Raw materials Step 2 Station 2 (5 min) Station 3 (10 min) Station 4 (10 min) Product: Delta Price: $95/unit Demand: 275 units/month b. Using the bottleneck-based method, what is the optimal product mix and what is the overall profitability? The product mix obtained using the bottleneck method is as follows. (Enter your responses as whole numbers. If your answer has decimal places, round your response down to the next whole number.) Product Units to be produced Alpha Bravo Charlie Delta This product mix yields a profit of $ (Enter your response as a whole number.)