Answer:
The answer is produce more book because there will be a profit of $5 for each additional guidebook
Step-by-step explanation:
Marginal cost is that the cost of manufacturing one additional unit of a product or service.
Equilibrium Price is $35
Marginal cost is is $30
Equilibrium Price is higher or greater than marginal cost( P > MC)
Since equilibrium price is above(greater) marginal cost, then it'll be profitable to manufacture or prodduce additional unit(s) of guidebook, and the profit will be:
$35 - $30
=$5