Function calcPrice

calcPrice(units, totalPrice, unitDecimals?, priceDecimals?, noAbs?): bigint
Calculates the unit price based on the number of units and total price.
Parameters
- units: string | bigint
- totalPrice: string | bigint
- Optional unitDecimals: number
- Optional priceDecimals: number
- Optional noAbs: boolean
  pass true to allow -ve values for resulted unit price
Returns bigint
Example
```
calcPrice(BigInt(2e6), BigInt(1e5), 6, 6) // 50000n
```