I would guess the acid malt is only there for pH adjustment. If you're using recipe software for water treatment, etc make sure the amount is appropriate (but that looks like a typical percentage.) I would also guess that, based on standard brewing practice, they use a larger amount of "pale" (meaning basic US 2-row) as a base, and lesser amounts of Pils and Munich for flavor. This beer is pretty light in color, so make sure you don't overdo the Munich (maybe keep it to 10%? Still plenty of flavor.) Given only a list of hops and not their usage, I would assume Comet and Polaris are for bittering and Simcoe for finish. Quantities to hit the IBU depend on your system. Calculators or recipe software can help. Hope this helps you think about your approach. Like Bob357 said, it may take a few tries to dial it in. Enjoy drinking your prototypes along the way.