To calculate the total amount Carl earned for the 6 wreaths he made, we multiply the number of wreaths by the amount he earns per wreath.
First, calculate the total earnings:
\[ \text{Total earnings} = \text{Number of wreaths} \times \text{Earnings per wreath} = 6 \times 35.40 \]
Now, perform the multiplication:
\[ 6 \times 35.40 = 212.40 \]
Next, we round this amount to the nearest dollar:
\[ 212.40 \text{ rounds to } 212 \]
Since none of the options provided include 212, let's confirm the math and round one more time, just for clarity.
The choices given are:
A. $216
B. $210
C. $222
D. $204
Given that $212 is closest to $210 when rounding to the nearest ten dollars, the estimated correct answer is:
\[ \text{Rounded Total Earning} \approx 210 \]
Therefore, the correct answer is:
B. $210