By Eating 1 Cracker, 1 Pretzel, and 1 Cookie, One $149 \mathrm{mg}$

Multiple Choice

By eating 1 cracker, 1 pretzel, and 1 cookie, one would ingest $149 \mathrm{mg}$ of sodium. By eating 8 pretzels and 8 cookies, one would ingest $936 \mathrm{mg}$ of sodium. By eating 6 crackers and 7 pretzels, one would ingest $535 \mathrm{mg}$ of sodium. How many $\mathrm{mg}$ of sodium are there in one pretzel?

A) $50 \mathrm{mg}$
B) $48 \mathrm{mg}$
C) $49 \mathrm{mg}$
D) $47 \mathrm{mg}$