I chose 3 tables representing entities to be used in a SignEstimator app I am developing for CSC-212. A table for the signs themselves with various attributes, a table for the available material the signs can be printed on and the cost of each, and a table for the available finishing touches and their cost. Each table has an integer based id as its primary key. The foreign keys in the Sign table point to the primary keys of the Material and Finishes tables because each Sign can have one of many available materials/finishes from those tables