###Human: Dorothy sells glass frames at half the price that Jemma sells them. Jemma sells the glass frames at 5 dollars each, selling twice as many frames as Dorothy does. If Jemma sold 400 frames, how much did they make together in total from the sale of the glass frames?, ### Assistant: If Jemma sold 400 glasses frames at $5 each, she made 400*$5 = $2000
Jemma sold twice as many frames as Dorothy, meaning Dorothy sold 400/2 = 200 frames.
If Dorothy sold her glasses frames at half the price that Jemma sold hers, then it means she sold her glasses frames at $5/2 = $2.5 per glasses frame.
In total, Dorothy made $2.5*200 = $500 from the sale of her glasses frames.
Together, they made $2000+$500 = $2500 from the sale of the glasses frames. 
 So the answer is :  2500