Wall Street Journal Top College ranking

Does anyone know how the category Academic Spending Per Student is calculated?

“By looking at the amount of money that each institution spends on teaching per student (11%), we can get a clear sense of whether it is well funded, with the money to provide a positive learning environment. This metric takes into account spending on both undergraduate and graduate programmes, which is consistent with the way that the relevant spend data is available in IPEDS. Schools are required by the Department of Education to report key statistics such as this to IPEDS, making it a comprehensive source for education data. The data on academic spending per institution are adjusted for regional price differences, using regional price parities data from the US Department of Commerce’s Bureau of Economic Analysis.”

If the figure quoted in the WSJ article includes money spent on grad students, is there any way of knowing how much is spent on undergrads?