We'll give you another 1% to make up for the expenses in your sales promotion.

我们再给贵公司1%以弥补贵公司的促销费用。

youdao

The usual granted commission is 3% and it is especially raised to 5% to cover (compensate for) the incurring advertising expenses in sales promotion.

我们通常给3%佣金，但考虑到你的情况，我们特地将佣金提高到5%，以便补偿你方推销时所需的广告费。

youdao