Hello lightninghelix

Suppose they make deluxe notebooks and regular notebooks.The total selling price is $ .a deluxe notebook with subject dividers, which sells for $4.00, and a regular notebook, which sells for $3.00.So the total production cost is $The production cost is $3.20 for each deluxe notebook, and $2.60 for each regular notebook

between 2000 and 3000 deluxe notebooks

between 3000 and 6000 regular notebooksnot more than 7000 altogether

Can you continue from here?

Grandad