Inventory/Cost of Goods

I have a huge data containing Cost of Goods (114 Nos) over 20 years. The dataset is very huge and I have no idea how to proceed with it. I was an accounting student and have never done this before. I was never a very bright student and even in my previous course I availed Accounting Assignment Help. I need someone to help me with this Data Analysis. I have a set of questions provided by my instructor and I have to answer them based on the dataset. Can anyone help me out?

This general statistical question should be posted on I’ll remove it here in 24 hours. You also violated site rules by not using your real name in your profile. I will delete your profile in 24 hours.