step by step using word, not by hand please

Tee Times,Inc. produces and sells the finest quality golf clubs in all of Clay County. The expects the following revenues and costs in 2004 for its Elite Quality golf club sets revenues (400 sets solid @ $600 per set) 240000 variable costs 160000 Fixed costs 50000 a-How many sets of cubs must be sold for Tee Times inc. to reach their breakeven point? b-How many sets of clubs must be sold to earn a target operating income of $90,000? c-What amount of sales must Tee times,Inc have to earn a target net income of $63,000 if they have a tax rate of 30%