Simple excel macro required

Hi, I have an excel which have formulas accessing multiple sheets. As a part of this project i need the below functionality. There is a drop down list which has some values( Say X, Y,Z..), I have three to four formulas which basically does simple lookup or sumif based on the value selected. I need to replace this drop down with some buttons. All the drop down values will be replaced by a button on the excel sheet. On click of this button, the formulas needs to be executed and the corresponding cells should be populated. A new simple functionality should also be created. I am looking to hire a vba expert for a long time relation as i need many excel documents similar to these which needs to be converted to macros. My budget is limited 30-50 dollars for this project. Please feel free to ask me any questions. I will share the excel document and detailed requirement to the selected freelancer.