I don't think it's a good plot. Why not?
First, the categories of household composition are not clear. In particular, how is "one adult" different from "single female" or "single male"?
Second, it's pretty clear that this is two years. But the years should be stacked. Surely what is spent on a particular day in one year is similar to the same day in another year? If you stacked it, then the apparent peak just before Christmas and sharp drop after Christmas would be clearer.
Third, as @Kodiologist noted, the labels for weeks aren't great. People don't think of "week 22" they think of "June". It should be labeled in months, with labels for, I think, the first of every other month.
Fourth, I agree with @Kodiologist that the stacked nature of the plot isn't great. What if, one week, "single female" drops below "single male"? Also, as @mdewey pointed out, the only cue to category is color, which can be hard for some people. I would use lines (with white space in between) and vary both line color and line type (dash, dot, dot-dash, etc).
Fifth, what is the unit of "spend"? I can't think of one that makes sense here. It should be dollars (or other currency) per week. But right now, I don't know what it is. For money variables, I also like to use a log scale.
Finally, is the data correct? How can "one adult" spend more than "two adults with kids" and also more than "single male" or "single female"?