Three 7-second MiniMax H3 clips cost $1.59: rounding is per clip

Sume rounds the billable amount of each video job up to the next cent, so three 7-second MiniMax H3 clips at 768p cost $1.59 and not the unrounded $1.575. One clip is 7 x $0.06 = $0.42 list, $0.525 after the 1.25 margin, and $0.53 once rounded up.

The rule

For video rows priced per second, Sume takes the provider list for the clip, multiplies by 1.25, and rounds up to a whole cent. The rounding happens once per job, on the total, not on each second. A job always bills at least the unrounded amount.

Examples where rounding shows

The amount lost to rounding is under one cent per job, so it only matters when you run many small jobs. These are the cases where the per-second price does not land on a cent.

What to do with it

Do not forecast a month by multiplying a rounded per-second rate. Compute the cost of one job at its real length, round up, then multiply by the number of jobs. A forecast of 200 H3 clips of 7 seconds at 768p is 200 x $0.53 = $106.00, while the smooth per-second figure would give $105.00 and be wrong by $1.00.

The rate is a good first estimate, and the job amount is what lands on the invoice. The usage.cost field on a finished video job is the billable amount.

• Round each job up, then add.
• Fewer, longer jobs lose less to rounding than many short ones.
• Rates that are whole cents per second, such as H3 Max 768p at $0.10, never round.

Why Sume rounds this way

Billing in whole cents keeps the workspace balance in the same unit as every other charge. Rounding up on the job total, rather than per second, means the loss to rounding is always under one cent per job, and a long job loses less in relative terms than a short one. The reserve taken at submit time follows the same list times 1.25 rule, and the final amount is shown as usage.cost. If you compare with a vendor's per-second rate, remember that the vendor's number is before the 1.25 factor and before rounding, so the two will not match to the last cent. For forecasts over a few hundred jobs, compute per job and add; the difference is small, but it is easy to get right.