Foundry & Forging calculator
Casting Lot Cost Calculator
Reconcile assigned production expense for one casting lot. Enter started and accepted counts, variable cost, documented allocation, setup and separate rework expense.
What this calculator does
- Total a casting lot’s assigned production expense and cost per accepted casting.
Formula used
- Allocated variable cost = started castings × variable cost per casting × allocation ÷ 100
- Lot cost = allocated variable cost + setup cost + separate rework
- Cost per accepted casting = lot cost ÷ accepted castings
- Unaccepted castings = started castings − accepted castings
Inputs explained
- Castings Started in the Lot: Whole castings started within this lot’s production cost boundary.
- Accepted Castings: Accepted output released from the same lot.
- Variable Cost per Started Casting: Recorded variable production cost before the documented job allocation.
- Lot Cost Allocation: Documented lot share of the entered variable production expense.
- Fixed Lot Setup Cost: Setup expense excluded from variable production and rework.
- Separate Rework Expense: Recorded rework expense outside the entered variable rate.
How to use the result
- Best suited to casting lot Reconciliation, accepted unit cost review.
- Selling margin, tax and unrecorded scrap credits are excluded. This job analysis does not prescribe financial inventory valuation.
Current U.S. benchmarks
- The producer price index for steel mill products stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. Quotes priced off last quarter's material cost miss this move.
- The U.S. has 3,569 primary metal manufacturing establishments employing about 354,911 workers (Census County Business Patterns, 2023).
Common questions
- Why use castings started for variable cost? Each started casting consumes the costs represented by that rate, even if it is rejected. Accepted output is the denominator for the usable unit cost.
- Does the allocation reduce setup and rework? No, it applies to variable production expense only. Enter setup and rework already assigned to this lot.
- What if every casting is rejected? The total recorded lot expense still applies. Cost per accepted casting is undefined because there is no accepted output.
- Should I include scrap recovery in the variable rate? Use one documented basis consistently. This model has no separate recovery field, so a net variable rate must already include its assigned credit without duplication.
Last reviewed 2026-10-06.