По поводу will всё же согласна с Dimking'ом

вот этот вот:

I hope to commence our co-operation by the end of the month

звучит куда более по-английски.
советую взять его и выкинуть свой русизм.

:-)

the traditional rules. The traditional rules state that you use shall to show what happens in the future only when I or we is the subject: I shall (not will) call you tomorrow. We shall (not will) be sure to keep in touch. Will, on the other hand, is used with subjects in the second and third persons: The comet will (not shall) return in 87 years. You will (not shall) probably encounter some heavy seas when you round the point. However, you can use will with a subject in the first person and shall with a subject in the second or third person to express determination, promise, obligation, or permission, depending on the context. Thus I will leave tomorrow indicates that the speaker is determined to leave. You shall leave tomorrow has the ring of a command. The sentence You shall have your money expresses a promise (“I will see that you get your money”), whereas You will have your money makes a simple prediction. 1
the reality. The English and some sticklers about usage are probably the only people who follow these rules, and then not with perfect consistency. In America, people who try to adhere to them run the risk of sounding pretentious or haughty. Americans normally use will to express most of the senses reserved for shall in British usage. Americans use shall chiefly in first person invitations and questions that request an opinion or agreement, such as Shall we go?, and in certain fixed expressions, such as We shall overcome. In formal style, Americans use shall to express an explicit obligation, such as Applicants shall provide a proof of residence, though must or should works just as well here. In speech you can get the distinctions in meaning delineated in the traditional rules by putting stress on the auxiliary verb, as in I will leave tomorrow (“I intend to leave”). You can also choose another auxiliary verb, such as must or have to, that is less open to misinterpretation, or you can make your meaning clear by adding an adverb such as certainly.

Shall versus Will.
An old distinction, more common in British than in American English, still comes up from time to time. To wit: will is usually the simple future indicative: "This will happen," "You will be surprised." Shall is related to the subjunctive, and means "Let it be so," which you might see in legal or business writing: "The employee shall produce all required documentation," "A committee shall be appointed," and so forth. (They're not just predicting that the employee's going to do it or the committee is going to form; they're declaring that they must, or at least should, happen.) But this rule works only for the second person (you) and the third person (he, she, it, they). The first person — I and we — reverses the rule, so "I shall do it" means I'm going to get around to it, while "I will do it" shows a mustering of resolve (let it be so).
A favorite example to clarify the two: "I shall drown, no one will save me!" is a cry of despair, simply predicting imminent death — both are simple futures. "I will drown, no one shall save me!" is a suicide vow, a declaration that no one had better try to stop me.
I know, it's confusing, but it's nothing to worry about. Just don't throw shall around unless you know what you're doing. [Revised 3 November 2000.]

И многое многое другое, я использую в основном will or 'll

я, хоть, конечно, слишком давно, но "иняз финишт" всё-таки :-))

а что касается 'll, нас учили, что на/в письме (деловом к тому ж) нужно писать полные формы. ну, типа правило такое.

I hope that we will have commenced/begun our work/operations by the end of the month/I hope that the work/operations will have been commenced/begun by the end of the month/I hope that we will commence our work/operations at the end of the month.