Fiona's Fashion Store is world renowned for its buttoned uniforms. A collection of $36$ shirts and $42$ jackets contains $842$ buttons. A collection of $6$ shirts and $7$ jackets contains $137$ buttons. Each shirt has the same number of buttons, and each jacket has the same number of buttons. **How many buttons are there in a Fiona's Fashion shirt, and how many buttons are there in a jacket?** [[☃ radio 1]]