since I am at it anyway

I do the shopping.

私は買い物をします

Since I am at it anyway, I do the shopping.

私はせっかく買い物をします

Since I am in town anyway, I do the shopping.

私はせっかく町に出たついでに買い物をします

Since I am in town anyway, I do the shopping with my family.

私はせっかく町に出たついでに家族と買い物をします

Since I am in town anyway, I do the shopping with my family at the traditional market.

私はせっかく町に出たついでに家族と伝統市場で買い物をします