International Development homework help

There are 3 problems that I have to solve in first PNG file. The second PDF file has similar problems with answers, and I want you to use it for solving first file problems.Correct answers are important but I really need to see more detail steps solution than second file solutions.Attachment 1Attachment 2

 
"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!"

"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!":

Get started