Write a word problem that can be solved by finding the numbers that have 4 as a factor

Need this asap if anyone can i would be very grateful. if you could show workings that would really

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?