Create a visualization that allows one to infer the net sales amounts versus the number of transactions $($i$.$e$.,$ how many transactions corresponded to net sales between x and y$,...).$ We also want to have an idea of how the "type of customer" relates to this, i$.$e$.,$ we want to have an idea about how much of the net sales correspond to regular and promotional customers. Relate all of these factors in a single visualization.