see the textbox tutorial: https://www.scirra.com/tutorials/624/te ... le-textbox
Let's go slowly for what you wanna do. First, let's just have only this:
(stat 1) (Stat2) and (fixed number)
one line and 3 numbers.
For stat 1 and stat 2, you can use TextBoxes there. For the fixed number, you can use text object. These are taught in the link above.
Also, from the tutorial above, you also learn how to treive the value from the textbox. If you have two textbox objects, for example, TextBox1 and Textbox2, you can refer to the texts inside the textboxes with TextBox1.text and TextBox2.text.
For the sake of simplicity, in the event sheet, you can use "every tick : set text object's text to int(TextBox1.text) + int(TextBox2.text) .
This will make it so the value of text object will be set to 2 values of the Textboxes being added up every tick.
Do you follow everything so far? If so, I will proceed for 7 lines just like you want.