Problem solving

I am learning to problem solve in maths, the topic is In the money.
I can use talk moves like can you explain this in another way and others , use a systematic table and explaining about my work that I have done.
I need to work on using my space on my book more wisely.
My next step is to share all my ideas with my group and writing my math expression.
The easy part was writing all the things my group and I discovered about the problem.
The hard part was getting the right answer and crack the code but I got there.
I could improve by making sense in my work.
Here is my proof.