 Okay, what I think is great about this problem is that it forces us to cube our conversion factors. It's got too many different conversions to actually write them all out. So it really forces our hands. So I think that's really good for us at this point in time. But anyway, so what we're really converting is volume to mass. And in order to do that, well, we're converting volume from B cubed to mass in kilograms. So we're going to have to use several conversion factors. The first being one foot equals 12 inches. The next being one inch equals 2.54 centimeters, both of those you should know. The problem gives you the density of ice at 0.917 grams per cubic centimeter. And you're going to use that as your third conversion factor. So in order to do get the mass of ice, you write down that volume, 8,975 feet cubed. And then you're going to use that first conversion factor, putting feet in the denominator inches in the numerator, so you can cancel out feet, but you're going to have to cube the whole conversion factor. So make sure you're cubing your 12, that was well, the number 12. Same thing with the next conversion factor, 2.54 centimeters divided by one inch because you want to get those inches cubed out of there. You're going to cube the 2.54 centimeters. And now you have centimeters cubed, but you don't want centimeters cubed, you don't want volume at all. So using the density, that's going to convert the volume to the mass, so that's nice. So putting the cubic centimeters on the bottom, that's going to give us units of grams, but the problem wants the answer to be given in kilograms. So you know that there's a thousand grams per kilogram, so you're going to cancel your grams out, and that's going to leave you with the units of kilograms. And then from the initial values given in the problem, the volume was four sig figs. So you're going to have your answer to four sig figs, 2.330 times 10 to the fifth kilograms. Okay, so make sure you have your correct units, correct significant figures, correct scientific notation, and you should be good. Let me know if you need any help with this one.