how to start a scatter chart axis values from different figures

Hi

I have this straight line scatter chart. Please see the attached sheet.
I need the sales value to start from $20000and then incease by $ 5000 and max $ 40,000
At the moment it does not look very nice.
Can someone help me please.

thank you
chawee

Thanks Andy,

I will change the other axis also to start with 0 so that both starts with 0.
appreciate your time

chawee