Final answer:
By calculating 25% more than 36 tacos and 20% more than the resulting number of pretzels, we found out that the French club sold 54 crepes overall. With each crepe priced at $3, their total earnings would be $162.
Step-by-step explanation:
To calculate the total money earned by the French club from the sale of crepes, we need to first find out how many crepes were sold. The Spanish club sold 36 tacos, and the German club sold 25% more pretzels than tacos. This means the German club sold:
36 tacos + (25% of 36 tacos) = 36 + (0.25 × 36)
= 36 + 9
= 45 pretzels
Next, the French club sold 20% more crepes than the number of pretzels sold by the German club, so they sold:
45 pretzels + (20% of 45 pretzels) = 45 + (0.20 × 45)
= 45 + 9
= 54 crepes
Since each crepe was sold for $3, the total earnings from crepes would be:
54 crepes × $3 per crepe = $162
Therefore, the French club earned a total of $162 from the sale of crepes.