The gym needs to buy 20*10=<<20*10=200>>200 bikes
20*5=<<20*5=100>>100 each of treadmills and ellipticals
So the bikes cost 200*700=$<<200*700=140000>>140,000
The treadmills cost 700*1.5=$<<700*1.5=1050>>1,050 each
So they cost a total of 1050*100=$<<1050*100=105000>>105,000
The ellipticals each cost 1050*2=$<<1050*2=2100>>2100.
So in total the ellipticals cost 2100*100=$<<2100*100=210000>>210,000
So the total cost of everything is 140,000+105,000+210,000=$<<140000+105000+210000=455000>>455,000
#### 455,000