a) left off on page 183 .epub, Ch. 10 Iteration E1: Creating a smarter Cart.
b) Left off on needing to create a rails g migration combine_items_in_cart command but wanted to look a head in the ebook to see if I had already implemented the next items.
a) created a migration file that combined items in cart.
b) left off on page 187 .epub, Ch. 10 Iteration E2: Handling Errors
a) finished Ch 10, E2 and E3.
b) left off on page 196 .epub, Ch. 10 ... last page "playtime", stuff to try on your own.