I was being dumb, I realized where I got confused and came back to delete my question. Thanks for being so kind!It is cheaper to buy an MBTA pass through the flyer, rather than from the MBTA website. MBTA sells LinkPasses for $84.50/month on their website, which adds up to $338 over 4 months, equivalent to 1 semester. However, if you're buying a LinkPass using the flyer, the rate becomes $75.21/month, which is $253.50 for the entire semester. The difference in price here is 25%, which is as advertised on the flyer.