Beginventory 39 units@49
Sale 28 units@69
Firstpurchase 26 units@52
Sale 15 units@70
Secondpurchase 21units@55
Sale 30units@72

How to cal the cost and ending inventory for LIFO and FIFO

Our guidelines for homework are that we do not do your work for you. You should show an attempt to do the work first, and we can then correct/guide you and give further hints.

It's also impossible to show an example without knowing whether this is perpetual or periodic. So here's a link going over this, to help with your attempt at doing the problem:
Principles of Accounting Chapter 8 (http://www.principlesofaccounting.com/chapter%208.htm#inventory%20costing%20methods)