$2-$ Two couples are going to get married on the same day to stay within their budget and save their money for buying

their first homes. They decide to do their preparation together to have more fun during shopping. First they decide to

purchase four rings, let$$s call them rings $1,2,3,$ and $4,$ for which they take quotes from four stores, let$$s name them

similarly, stores $1,2,3,$ and $4.$ The quotes for each ring from each store are given in the table below. Please write an

abstract $($or symbolic$)$ mathematical model, solving the couples know which ring should be purchased from which

store to minimize the costs $($you do not need to solve the model and also you can just buy one ring from each store$).$

Ring$\backslash$Store $1234$

$115131417$

$211121513$

$313121011$

$41517141$