Shopify Design & Development

ok i have the two options i need....most importantly i need to make sure i can update current items and create new items via csv. The picture on the left where the yellow highlight is, the quantity of numbers need to be changed on the csv file for importing items and also the price the reflects the quantity. The prices should automatically reflect on the cart showing the original price and the new discounted price in the cart. Next, the picture of the right where the yellow i highlighted. I need also the csv file for "Buy 3 or more" "$77.25/Case" "Buy 1 - 2" "$79.99/Case" needs to be changed in the csv file of importing (columns for these in the importing process needs to be there). Will the prices reflect in the cart? I need to have the price reflect in the cart where the original price is and the new discount price is shown. and if the decide to lower the quantity the price will go back to the original price depending on the quantity. Next, the purple/pink square shows what kind of "add to card" button i need. I need one that i can input the quantity. Right now, I have an option of drop down of the quantity. Please let me know which one works best in the first option