100 ads, 3 hooks each, 20% retakes: the video bill on Sume

Three hook variants for 100 ads is 300 first takes, and a 20% retake rate makes it 360 clips. At 5 seconds each, 360 clips cost $115.20 on Wan 3.0 at 480p, $226.80 at 720p, and $486.00 on Seedance 2.5 at 480p ($1,040.40 at 720p).

The arithmetic

Clips = ads x hooks x (1 + retake rate) = 100 x 3 x 1.2 = 360. Cost = clips x the per-job price, where each 5-second job is list x 1.25 rounded up to the cent. The retake rate is your assumption, not a measured figure.

Cutting the bill

Generate all 300 hooks at a draft tier, pick the best hook per ad, and re-render only the 100 winners at the final tier. With Wan 3.0 that is 300 drafts at 480p plus 100 finals at 1080p: $221.00, against $450.00 for 360 clips at 1080p.

Drafts and finals must be re-rendered, not upscaled: a new job at a new tier is a new price.