multi-period Macro attrib with the wrong currency? security, domestic, currency, allocation

krause2

in v6 page p223, there is an example of multi-period attrib for Market and security selection.
However, the returns used in the math are all in base (domestic currency).

I know for a fact the market and security allocation effects uses the 'local' (foreign) returns.
Market alloc =SUM R jbf ( Wjp- Wjb)
Security alloc = SUM Wjp ( Rjpf- Rjbf )

Now I am really confused why they are using Base(domestic) currency for Macro Attrib.
Any ideas?

sh34