Combining Data from Two Redux Slices to Build our Shopping Cart

This lesson is pretty straightforward but demonstrates how we're combining data from two different redux slices in a single component. We have product data from the productsSlice and shopping cart information from the cartSlice. Neither of these is sufficient on its own, so it requires us to combine them at render-time. It's pretty common to have 5 or 6 selector functions at the top of a large component.

Note: One thing missing from the lesson is that our <tr> element needs a key={id} to ensure React handles updates properly. You'll likely see a warning in your console about this.