三个函数串起来

运行下面的 Python 3 程序，填写结果。

def keep(amounts, line):
    out = []
    for a in amounts:
        if a >= line:
            out.append(a)
    return out

def to_jiao(amounts):
    out = []
    for a in amounts:
        out.append(a * 10)
    return out

amounts = [120, 80, 200, 150]
print(sum(to_jiao(keep(amounts, 100))))