need to know overall marginal %

Text AutoSum Recently Financial Logical Used Insert Function Functions Manager 20 Create from Selection Time Reference Trig Defined Names Function Library 415 V X L A B D Initial Unit Initial Buy at Initial Buy at Unit Buy Cost Retail Sales Dollar Sales Sell-thru % SKU# Cost Retail Margin % $4,250 725 $3,081 72.50% 1234567 $1,780 $ 1.78 $ 4.25 58.12% 1,000 280 $2,268 $5,280 23.30% $ 1.89 $ 1234568 57.00% $1,232 4.40 1,200 4.65 1234569 54.40% 44.20% $ 2.12 $ 1,200 $2,544 $5,580 530 $2,465 $ 2.25 $ 4.80 1234570 53.10% 500 $1,125 $2,400 352 $1,690 70.40% 1 1234571 $ 3.46 $ 9.25 62.60% 750 $2,595 $6,938 199 $1,841 26.50% 2 1234572 $ 5.55 $ 18.80 70.50% 750 $4,163 $14,100 210 $3,948 28.00% 3 4 Total 5,400 14,475 38,548 2,296 Overall Margin % 14,256 Overall Sell Thru Sheet1 Sheet? Sheet3