score:12
Lifting the contents of the very helpful link provided by @gvk into an answer:
Source: Fiat Money in 17th Century Castile, by François R. Velde, Federal Reserve Bank of Chicago, and Warren E. Weber, Federal Reserve Bank of Minneapolis and University of Minnesota.
Footnote 1 states:
The ducat disappeared as a coin in 1537 but remained as a unit of account, representing 375 maravedis.
Table 2 Castilian monetary system, ca. 1590 (before the onset of vellón inflation) lists the following in the column "Purchasing Power":
So 1 ducat was the rough equivalent of 1/4 the minimum weekly middle class income. It would have bought you four and a half days of skilled labor. Or 7 (live!) chickens, a bottle of wine and a pound of bread. ¡Buen provecho!