JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.2.1.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.inputmask/3.3.4/jquery.inputmask.bundle.min.js"></script>

<form method="post" action="">
<div id="circulantes">
    <div class="ativocirculante" id="ativocirculante">
        <h2>ATIVO CIRCULANTE<input type="text" placeholder="R$ 0,00" id="ac" readonly/></h2>
        <h4>Ativo Errático (Financeiro) <input type="text" placeholder="R$ 0,00 aplicações" id="ae"/></h4>
        <h4>Disponíveis (Caixa e Bancos)<input type="text" placeholder="R$ 0,00" id="disp"/></h4>
        <h3>ACO<input type="text" placeholder="R$ 0,00" id="aco" readonly/></h3>
        <h4>Contas a receber<input type="text" placeholder="R$ 0,00" id="cr" name="ncr" value="" class='ncrTot' readonly/></h4>
        <h4 id="cr1">Até 30 dias<input type="text" placeholder="R$ 0,00" id="cr11" name="ncr11" class='ncr11 ncr_value'/></h4>
        <h4 id="cr2">31 a 60 dias<input type="text" placeholder="R$ 0,00" id="cr22" name="ncr22" class='ncr22 ncr_value' /></h4>
        <h4 id="cr3">61 a 90 dias<input type="text" placeholder="R$ 0,00" id="cr33" name="ncr33" class='ncr33 ncr_value' /></h4>
        <h4 id="cr4">Acima de 90 dias<input type="text" placeholder="R$ 0,00" id="cr44" name="ncr44" class='ncr44 ncr_value' /></h4>
        <h4>Estoque<input type="text" placeholder="R$ 0,00" id="est"/></h4>
        <h4>Adiantamento a Fornecedores<input type="text" placeholder="R$ 0,00" id="af"/></h4>
        <h4>Despesas antecipadas<input type="text" placeholder="R$ 0,00" id="da"/></h4>
</div>
</form>

JavaScript

$('.ncr_value').inputmask('decimal', {
                'alias': 'numeric',
                'groupSeparator': ',',
                'autoGroup': true,
                'digits': 2,
                'radixPoint': ".",
                'digitsOptional': false,
                'allowMinus': false,
                'prefix': 'R$ '
    });

$(document).on('keyup blur change','.ncr_value',function(){
		var v = 0;  
		$('.ncr_value').each(function(b,c) {   
    	if ($(c).val()) {
      	var a = $(c).val().replace('R$','');
        console.log(a);
      	var b = a.replace(',','');
      	v += parseFloat(b);
    	}
    });
    $('.ncrTot').val('R$' + v.toFixed(2));
    console.log(v.toFixed(2));
});