A store ordered 300 more than twice as many pens as it did pencils at $5 each. If the cost of a pencil was $4, and the store ordered 15 boxes, each having 80 pencils, calculate the total amount of money they paid for the stationery.
If the store ordered 15 boxes, each having 80 pencils, they ordered 15*80 = <<15*80=1200>>1200 pencils.
If the cost of a pencil was $4, the store paid $4*1200 = $<<4*1200=4800>>4800 for all the pencils.
Twice as many pens as pencils that the store ordered are 2*1200= <<2*1200=2400>>2400
If A store ordered 300 more than twice as many pens as it did pencils, it ordered 2400+300= <<2400+300=2700>>2700 pencils.
Since the cost of the pens was $5, the store paid 2700*$5 = $<<2700*5=13500>>13500 for the pens.
The total amount of money they paid for the stationery is 13500+4800 = $<<13500+4800=18300>>18300
#### 18300