Proposal to describe behaviour of UnitBasis on component CostValues

If a CostValue has component CostValues, what is the meaning of UnitBasis?

Here is a grammatically legal description of a cost value and 2 cost value components:

```
Formula: A = B + C
A.ArithmeticOperator = ADD
A.AppliedValue = 5.97 (calculated by software)
A.UnitBasis = 10m2
B.AppliedValue = 2
B.UnitBasis = 9m2
C.AppliedValue = 3
C.UnitBasis = 8m2
```

Here's a conversion into English: "The cost rate is $2 per 9m2 + $3 per 8m2, which should be expressed as (2/9 + 3/8)*10 = ~$5.97 per 10m2.

Is this crazy? Is this allowed? It is mathematically sound. Should it be documented?