What every company, business and store owner needs to be and remain successful.
How to make Friends and Influence People - Dale Carnegie (First published in 1937)
Page 117 (e-book version)
Ancient Chinese proverb
" A man without a smiling face must not open a shop"
Disclaimer
https://www.readanybook.com/online/574863
This is not financial advice and is written purely for entertainment purposes only. Please do your own thorough research and consult a business professional before you decide to start any business or open that shop.