discretionary fixed cost meaning in English

选择性固定成本
选择性固定性成本

The appropriate amounts of discretionary fixed costs are diffi ? cult to determine with precision , so budgeted amounts often are based on traditions , rules of thumb , or industry customs
准确地计量酌量性固定成本是不可能的，所以他们的预算通常根据传统、经验或行业惯例来确定。
The appropriate amounts of discretionary fixed costs are difficult to determine with precision , so budgeted amounts often are based on traditions , rules of thumb , or industry customs
可控固定成本的适当金额很难精确地确定，因此预算金额通常是根据惯例，拇指规则（经验法则），或者行业习惯。