Function calcTotalPrice

calcTotalPrice(units, unitPrice, unitDecimals?, priceDecimals?, noAbs?): bigint
Calculates the total price based on the number of units and unit price.
Parameters
- units: string | bigint
- unitPrice: string | bigint
- Optional unitDecimals: number
- Optional priceDecimals: number
- Optional noAbs: boolean
  pass true to allow -ve values for resulted total price
Returns bigint
Example
```
calcTotalPrice('100', '12', 2, 2) // 12n
BigInt(2223e17), '12000000', 18, 6) // 2667600000n
```