Y will be 14, the math changes to
Welcome to Misa San Pedro (Church) of Westpunt on Curaçao! There are lots of parking slots directly at the church.
To get the coordinates where the cache is hidden, please solve the following formula:
N12° (9*x-6).(50*y+92)
W69° (3*x).(30*z+41)
X = number of "windows" (slits) in the West front of the bell tower
Y = number of letters on the left plate, second line at the door framing
Z = number of waves painted on the frontside of the church (above the door)
Small note on cache maintenance: Curahousecare has graciously offered to assist. Thanks!