How much did the average loaf of bread cost in 1912 in u. s.?

The answer is About a nickel.

Explanation:

The most established measurable information I can find doesn't have data sooner than 1913, however in 1913 the normal portion of bread was appeared at 5.6 cents.  This was as announced in Historical Statistics of the United States: Colonial Times to 1970 (volume 2), as distributed by the U.S. Branch of Commerce.  Or on the other hand, as another precedent, the Denver post detailed that in 1912 Hurlbut's- - which was then a market in Denver- - promoted "six portions of 'natively constructed' bread for 25 pennies," which would work out as a unique cost under 5 pennies for each portion for the store's pastry kitchen bread.   (Source:  "A Titanic Difference in the Cost of Living 100 Years Later, The Denver Post, March 16, 2012.)

so what is your question?