formula help to workout if value is less than or greater than a given value.

Column D Column E


1 $113.98 $235.38
2 $39.00 $152.90
3 $178.40 $306.24
4 $114.61 $236.07
5 $109.04 $229.94
6 $183.86 $312.25
7 $118.39 $240.23

Column D is a cost price of a product & I wish for cell E1 to check cell D1 to see if value is less than 50, greater than 51 & less than 100, so on in multiples of 50 then if less than 50 add 100 & multiply by 1.1. 51-100 add 110& multiply by 1.1. Keeping increasing the add by 10 as multiples goes up.

Hope this makes sense.