You are paying $1,583.45 extra. I don't think it's worth it.
You have to do like draw a number line and do the opposite and you'll get your answer and add them together and you'll get 45.5
868 is about 870, and 28 is about 30, so your expression would be 870 divided by 30 which would be 29 and the actual answer is 31, so your estimate would be close to your actual answer.
1520 I believe im not 100% sure if I need to change it into inches hope I helped tho
