A dealer sells fans ($x$) at a profit of ₹50 each and lamps ($y$) at a profit of ₹30 each. Which is his objective function?

Explanation

1. 01

   Write each resource as (amount used per unit) × (number of units), added over the products.

2. 02

   'At most' or 'available' gives ≤, 'at least' or 'must give' gives ≥; a profit is maximised and a cost minimised.