English to Slovak Marketing Retail

As in "When the quality of the national brand is higher, the retailer sells both products but must decide who will produce his store brand. The trade-off the PL manufacturing depends on the cost disadvantage of the independent firm as well as the gain he can get from the NB negotiation outcome."
or
"the importance of the trade-off between efficiency and bargaining power in the retailer's choice of private label manufacturer"

Thank you.