I'm trying to get the value entered by the user and whenever he changes this redeemed value is also changed, but when I put a small value: R$5.00 nothing happens, is only accepting high value: 400.00 and the return an absurd 40,000.00. When I try to put a small value, the following NaN error occurs

const {valueAmount, textDescription} = props.navigation.state.params;
  const amoutSplit = valueAmount.split('R$ ');
  const includComma = amoutSplit[1].split(',');
  const amout = Number(includComma[0] + includComma[1]);

<Text>{Filters.convertMoneyTextMask(amout)}
</Text>

the mask

const convertMoneyTextMask = (value) => {
  if (value) {
    const stringOnlyNumbers = `${Number(value).toFixed(2)}`.replace(/\D/g, '');
    if (!stringOnlyNumbers) {
      return 'R$ 0,00';
    }

    const {length} = stringOnlyNumbers;
    if (length === 1) {
      return value >= 0
        ? `R$ 0,0${stringOnlyNumbers}`
        : `R$ -0,0${stringOnlyNumbers}`;
    }
    if (length === 2) {
      return value >= 0
        ? `R$ 0,${stringOnlyNumbers}`
        : `R$ -0,${stringOnlyNumbers}`;
    }
    let moneyMask = '';

    for (let i = length - 1; i >= 0; i -= 1) {
      if (i === length - 2) {
        moneyMask = `,${stringOnlyNumbers[i]}${moneyMask}`;
      } else if (i < length - 5 && (i - length - 3) % 3 === 0) {
        moneyMask = `${stringOnlyNumbers[i]}.${moneyMask}`;
      } else {
        moneyMask = `${stringOnlyNumbers[i]}${moneyMask}`;
      }
    }

    return value >= 0 ? `R$ ${moneyMask}` : `R$ -${moneyMask}`;
  }
  return 'R$ 0,00';
};