Has "Event/target entity" in inventory BLOCK/ITEM (More than just one item)

Context, I am creating a block that will build other blocks around it to form a complete multi-block, but only if the player has the required resources in their inventory. 

If player has these blocks/items, remove said items/blocks and place these blocks, else print material list.

The problem I have com across is not knowing how to specify how many of each item/block the player needs before the if statement is considered true/false.

I am not exactly sure how to do the images, so I hope what I wrote sufficiently described my dilemma. (If I need to post the image of the procedure, then I can if one were to tell me how)