Letter written by Rabbi Sholom Ber Pewzner of Balshan Printing house to a Rabbi who never paid for the printing of his book

I discovered a letter written by Rabbi Sholom Ber Pewzner, co-owner of the Balshan Printing house to a Rabbi Yosef Leib Yafeh of Detroit. Pewzner writes how they published a Journal titled מקבצאל for the Detroit Kollel, but have never been paid, leaving a balance of $309.97
The letter is an interesting look at some of the problems of the publishing house back in the day, this letter is dated Rosh Hodesh Av, 1979.

"לציין שהתנהגות כזו אינה מובנת לנו כלל וכלל בפרט וביחוד כאשר מדובר בבני תורה מסלתה ומשמנה"
"We note how such behavior is incomprehensible to us, especially noting that we are dealing with the finest Torah Students"

"ושחובותינו ישולם עוד לפני שנת השמיטה"
"And the debt shall be paid before the Sabbatical year arrives" (the Shemittah occurred 2 months after letter was written)