Apply a hypothetical custom Lang-style factor to purchased equipment cost. Remove existing example rows and enter exactly the three rows below.
1. Calculator Inputs
Select units before entering values.
| Calculator field | Value / setting |
|---|---|
| Currency | USD |
| Factor source | Custom project/company factor |
| Custom factor | 4 |
| Plant type | Mixed solid-fluid processing |
| Pumps | Quantity 2; unit cost $25000 |
| Tank | Quantity 1; unit cost $100000 |
| Heat exchanger | Quantity 1; unit cost $150000 |
2. Step-by-step Math
Purchased equipment total
Pumps = 2×25000 = $50000 Tank = 1×100000 = $100000 Heat exchanger = 1×150000 = $150000 Equipment total = $300000
Enter unit costs in the rows; the calculator multiplies by quantity.
Apply the factor
Total estimated plant cost = factor × equipment total Total = 4×300000 = $1200000
The factor includes purchased equipment cost. Do not add the $300000 a second time.
Implied other cost
Other cost = total−equipment total Other cost = 1200000−300000 = $900000
This is an aggregate difference, not an itemized installation estimate.
3. Compare Your Answers
Keep full precision until the final result. Display rounding may differ; compare answers rounded to three significant figures; retain unrounded intermediate values.
| Result | Expected answer | Your answer |
|---|---|---|
| Purchased equipment | USD 300000 | __________ |
| Factor | 4.00 | __________ |
| Total estimated plant cost | USD 1200000 | __________ |
| Implied other cost | USD 900000 | __________ |
Second check
Set the custom factor to 1. Total cost becomes $300000 and other cost becomes $0. Restore factor 4 to return to $1200000.
4. Assumptions and Method
All prices and the custom factor are hypothetical arithmetic inputs, not current quotations or a recommended estimating factor. Plant type does not change a custom factor. The factor’s project scope, location, date and exclusions must be established separately before using an estimate for a real project.
Equation definitions and implementation: open calculator. See also calculation methodology.