Stand in front of Mini Cactpot Broker
Press 'confirm'
Mini Cactpot Broker selected
Press 'confirm'
Dialogue box appears
Press 'confirm', "Purchase a Mini Cactpot ticket" confirmed
Dialogue box appears "10 MGP is required..."
Press 'confirm', dialogue box is closed.

Have to start over and use more keys or mouse cursor to proceed to 'Yes', etc.