MSM mod manual verification below:

Green Hill Zone Act 1: 30000

Green Hill Zone Act 2: 10000

Green Hill Zone Act 3: 10000

Green Hill Total: 50000

Bridge Zone Act 1: 10000

Bridge Zone Act 2: 1000

Bridge Zone Act 3: 10000

Bridge Zone Total: 21000

Jungle Zone Act 1: 5000

Jungle Zone Act 2: 10000

Jungle Zone Act 3: 10000

Jungle Zone Total: 25000

Labyrinth Zone Act 1: 10000

Labyrinth Zone Act 2: 5000

Labyrinth Zone Act 3: 10000

Labyrinth Zone Total: 25000

Scrap Brain Zone Act 1: 10000

Scrap Brain Zone Act 2: 1000

Scrap Brain Zone Act 3: 10000

Scrap Brain Zone Total: 21000

Sky Base Zone Act 1: 10000

Sky Base Zone Act 2: 30000

Sky Base Zone Total: 40000

Time Bonus Total: 182000 / 6000 = 30.333s

RTA TOTAL: 19m 54s 400ms (first frame at 04.900, last frame at 19:59.300)

TOTAL: 19m 54s 400ms - 30s 333ms = 19m 24s 067ms

Rmk: Time adjusted by 1s (from 19m 23s to 19m 24s)