I'll do ... for you, let me ... for you, will give
→ 上げる
あげdo for, give (someone the benefit of an action)+ようVolitional
auxiliary · informalCommon#6,280
I'll do ... for you, let me ... for youAttached to a verb in the て-form, あげよう offers to do something for someone’s benefit. Depending on the relationship and tone, it can sound patronizing.