Rare color combo on 1988 vette?????

I have a 1988 corvette coupe.
Exterior is 74 Dark Red Met.
Interior is 732 Red leather.

Have build sheet factory combo. If I am reading chart below correct this must be a special order of some sort. Anyone know how to find actual build amount of cars built with this combo?

Exterior/Interior Color Options
RPO Exterior        Interior Soft Top Production
13 Silver Metallic BK-G-R-S BK-W         385
20 Medium Blue Metallic B-BK         BK-W         1,148
28 Dark Blue Metallic BK-S         BK-S-W         1,675
35 Yellow                 BK-S         BK-W         578
40 White                 B-BK-G-R-S B-S-W         3,620
41 Black                 BK-G-R-S BK-S-W         3,420
66 Dark Orange (Pilot) NA NA 5
74 Dark Red Metallic BK-S         BK-S-W         2,878
81 Bright Red         BK-GR-R-S BK-S-W         5,340
90 Gray Metallic         BK-G         BK-W         644
96 Charcoal Metallic G-S         BK-S-W         1,046
40/41 White/Black         W         NA         2,050

Interior Color Codes
RPO Color Production
19C BK/C NA
60C S/C NA
113 W/L 2,050 (s)
192 BK/L 3,747 (s) - 3,087 (b)
212 B/L 919 (s) - 789 (b)
602 S/L 1,757 (s) - 1,449 (b)
732 R/L 2,913 (s) - 2,492 (b)
902 GR/L 1,338 (s) - 1,226(b)

Any help greatly appreciated.