Eliza buys 200 ornamental rings to sell in their local shop, twice the number of the remaining stock. After selling 3/4 of the total stock, her mother buys 300 more ornamental rings, and after three days, sells 150. What's the total number of ornamental rings remaining in the store?
If Eliza restocked twice the original number of ornamental rings, the number was 200/2= <<200/2=100>>100 rings.
The total number of ornamental rings in stock is now 200+100 = <<200+100=300>>300 rings.
When she sells 3/4 of the stock, the total number of rings sold is 3/4*300 =<<3/4*300=225>>225 rings.
The remaining stock is 300-225 = <<300-225=75>>75 rings.
When her mother buys 300 more rings, the stock is boosted to 75+300 = <<75+300=375>>375 rings.
She then sells out 150, reducing the stock to 375-150 = 225 rings
#### 225