Please let me know if you want me to add an explanation as to why this is the answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)
6 months goes into 2 years 4 times 30 x 4 = 120 120% of 15,000 is 100% is 1,500 10% is 150 150 x 2 = 300 (20%) 1,500+300=1,800 15,000+1,800=16,800 hope this helped