To find Taylor's commission, you can use the formula:
\[ \text{Commission} = \text{Sales Amount} \times \text{Commission Rate} \]
In this case, her sales amount is $1200 and her commission rate is 5.5%, or 0.055 in decimal form.
Now, calculate her commission:
\[ \text{Commission} = 1200 \times 0.055 \]
\[ \text{Commission} = 66 \]
So, Taylor's commission for last week is $66.