A problem for a friend III

If I can exchange $$1 \ \mathfrak{S} \text{ingapore} \ \mathfrak{D} \text{ollar}$$ for $$25 \ \mathfrak{T} \text{hai} \ \mathfrak{B} \text{aht}$$, and I can also exchange $$2.5 \ \mathfrak{M} \text{alaysian} \ \mathfrak{R} \text{inggit}$$ for $$1 \ \mathfrak{S} \text{ingapore} \ \mathfrak{D} \text{ollar}$$, how much $$\mathfrak{R} \text{inggit}$$ can I buy if I sell $$100 \ \mathfrak{B} \text{aht}$$ for $$\mathfrak{R} \text{inggit}$$?

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