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$M{D}_{r,s}=MBAS{E}_{r,s}*(1+(\frac{PR{I}_{r,s,t-1}*EXRAT{E}_r-MPRI{C}_{r,s}}{MPRI{C}_{r,s}}*{\mathbf{𝐞}\mathbf{𝐥}\mathbf{𝐚}\mathbf{𝐬}\mathbf{𝐭}\mathbf{𝐫}\mathbf{𝐩}\mathbf{𝐫}}_s){)}^{elmpr1}*(1+(\frac{PR{I}_{r,s,t-1}*EXRAT{E}_r-MPRI{C}_{r,s}}{MPRI{C}_{r,s}}-\frac{PR{I}_{r,s,t-2}*EXRAT{E}_{r,t-1}-MPRI{C}_{r,s,t-1}}{MPRI{C}_{r,s,t-1}}*{\mathbf{𝐞}\mathbf{𝐥}\mathbf{𝐚}\mathbf{𝐬}\mathbf{𝐭}\mathbf{𝐫}\mathbf{𝐩}\mathbf{𝐫}}_s){)}^{elmpr2}$

$\frac{2}{3}$

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