Endothon Tour Company operates a small tour with only one tour bus that takes tourists around Canyonlands National Park in southeast Utah. Because of a constraint in its design, Endothons bus can be configured to seat 10 premium seats or 20 economy seats, but there cannot be any mixture. Endothon must decide whether to operate a premium tour (with 10 seats per tour) or an economy tour (with 20 seats per tour).

Here are the revenues and costs associated these two configurations:

	Premium	Economy
Drivers, fuel, bus depreciation	$500 per tour	$500 per tour
Selling price	$150 per passenger	$50 per passenger
Food costs	$80 per passenger	$5 per passenger

Endothon is currently operating a premium tour.

How much would the net income per tour change if Endothon were to switch to having an economy tour?