Counter For Bundles, Counter for Bunches
counter
The kanji refers to a bundle, but this refers to a counter for bundles. Put this on a number, and you have "1 bundle" or "2 bundles" or even three, oh my!
わ
Saying "1 bundle" and "2 bundle" takes too long, so you decide to call these bundles what they look like: わ for walrus (わ)!
わっ！ほうれん草一把で九十八円だって。
Wow! A bunch of spinach is only ninety-eight yen!