Illustrations from Le Petit Journal Illustré.
Prices are high in France, February 1, 1920. Especially prices on imports are increasing. Important to remember when you make a story about the Roaring Twenties: they weren't so roaring for most folks, especially not in the early years. C'est la guerre!
How to be thrifty - stay out of cafés and dancings ('les dancings' were a popular form of entertainment, contrary to modern prejudice, the ordinary French have been pretty open-minded about Anglo-Saxon loanwords!). Be content with one serving of beefsteak. Have your old shoes fixed. More drastic: pour water in your wine and quit smoking! Is this France?