Breakeven win rate with Indian costs and gaps

An O'Neil-style system cuts losses at 8% and takes profits at 20%. Round-trip statutory and broker costs are 0.238% (Worked example 4.3) and slippage is 0.25% per side. (a) Express costs in $R$ and compute the breakeven win rate. (b) Gaps through the stop make the average loss $1.2R$. Generalise (4.5) to an average loss of $LR$ and recompute $p^*$. (c) At a 35% win rate, what is the expectancy per trade in $R$ under (b)?