If Jose and Co$.\text{'}$s markup percent is $20\%,$ the selling price of its product is $2,600$ and the cost of the product is $1,300,$ then Jose's gross profit percent is a$.10\%$ b$\mathrm{.}2\mathrm{.}5\%$ c$.40\%$ d$\mathrm{.}12\mathrm{.}5\%$