select round(sum(valor)) as 'Valor Estimado da Empresa é R$ ' from (
select sum( valor_entrada - valor_saida) as  valor
from caixa_movimento
where year(data) = year(current_date) and month(data) = month(current_date)

union

select (count(*) * 90 * 36) as valor from cliente where ra_situacao = 'Mensalista'


union

SELECT sum((100-DATEDIFF(current_date, data_compra) / 30 * depre_mensal) * valor / 100) 
 from patrimonio

union

select -6000
) as x