Van HeusenMen's Dress Shirt Regular Fit Poplin Solid

I need a shirt that’s 19” collar, 23” arm, 49” chest, 50” stomach. He is 6’3” tall.

My chest is 48" - does the 17" collar, 36/37 length fit that size chest?

Are these see through where you can see the undershirt?

Why is it not 17.50 anymore? Ahenni put it in my cart it was 17.50 the next morning it was 45