The item table can only have one item - this is the same as the edit screen, where there can only be one section per item. To differentiate this, the item variables are section variables. The top of the table contains the item's text and image details, with the price and quantity section repeated for each quoted quantity (i.e., 15, 50, 100, etc.).
Make sure the {Catalogue} variable is included in the table:
Which resolves into this:
Learn more: tiered quotes in Zigaflow