Just decrease my current "GIF" size (Urgent project)

I've 10 GIF's. I need to reduce my each gif size just it. I think it's very easy for experts, The gif's measurement will be same but the file size should be decreased. If you can please apply I will create milestone soon because I need the project complete soo, urgent project. Per GIF resizing budget 1 USD, only interested person apply, Thanks in advance. my gif size should become : 970x90 less than 700KB 728x90 less than 700KB 970x250 less than 700KB 728x90 less than 700 KB 800 X 60 less than 600KB 1022X115 less than 700KB 1000X 400 less than 700KB 960X 90 less than 700KB 728X90 less than 600KB 730x90 less than 600KB 320x120 less than 600KB