1/4 of 1 minute would be 1/4 * 60(seconds in a minute)
so that would be 60/4=15 seconds.
I'm not sure but, maybe if you divide 300000 by 5.5% and see what you get. Then times it by 6. Not sure if it's correct, maybe see someone else's answer?
40% of 20 is eight dollars, so the fan is now 28 dollars.
