Argyle sells steel beams to building contractors in two $$sizes:long dashregular and heavy. Argyle sells $4$ regular beams for every one heavy beam. Cost data are as$$ follows:

Regular

Heavy

Price per unit

$$$$20\mathrm{.}00$

$$$$28\mathrm{.}00$

Variable cost per unit

$$$$16\mathrm{.}00$

$$$$20\mathrm{.}00$

$$Argyle$\text{'}$s fixed costs are$$ $$2,880$ per month. How much is the breakeven point for total sales$$ revenues?